{"common":{"save":0,"post_id":"717","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"241","post_id":"717","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["5"]]],"list":[{"point":10,"width":50,"type_input":"","ques":"T\u00ecm x bi\u1ebft: 3. (x + 3) = 12. (6 - x) + 12 <br\/> V\u1eady x = _input_","hint":"Nh\u00e2n ph\u00e1 ngo\u1eb7c r\u1ed3i t\u00ednh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> \u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t: a. (b + c) = a . b + a . c \u0111\u1ec3 t\u00ednh <br\/> 3x + 9 = 72 - 12x + 12 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Coi 3x l\u00e0 s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft, (72 - 12x + 12) l\u00e0 t\u1ed5ng <br\/> Mu\u1ed1n t\u00ecm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft ta l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <br\/> <b> B\u01b0\u1edbc 3: <\/b> Coi 12x l\u00e0 s\u1ed1 tr\u1eeb , 3x l\u00e0 hi\u1ec7u<br\/> S\u1ed1 b\u1ecb tr\u1eeb b\u1eb1ng hi\u1ec7u c\u1ed9ng v\u1edbi s\u1ed1 tr\u1eeb<\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*}3. (x + 3) =& 12.(6 - x) + 12 \\\\ 3x + 9 =& 72 - 12x + 12 \\\\ 3x =& 84 - 12x - 9 \\\\3x =& 75 - 12x \\\\ 3x + 12x =& 75 \\\\ 15x =& 75 \\\\ x =& 5 \\end{align*}$ <br\/><span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 5<\/span>"}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:38"},{"id":"242","post_id":"717","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["58"]]],"list":[{"point":10,"width":50,"type_input":"","ques":"T\u00ecm x bi\u1ebft: 2x + (5 - x) + 3 . (x - 79) = 0<br\/> V\u1eady x = _input_","hint":"Ph\u00e1 ngo\u1eb7c r\u1ed3i t\u00ednh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> Ph\u00e1 ngo\u1eb7c <br\/> <b> B\u01b0\u1edbc 2: <\/b> Nh\u00f3m c\u00e1c s\u1ed1 h\u1ea1ng c\u00f3 x l\u1ea1i r\u1ed3i t\u00ednh <\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*}2x + (5 - x) + 3 . (x - 79) =& 0 \\\\ 2x + 5 - x + 3x - 237 =& 0 \\\\ (2x - x + 3x) - (237 - 5) =& 0 \\\\ 4x - 232 =& 0 \\\\ 4x =& 232 \\\\ x =& 232 : 4 \\\\ x =& 58 \\end{align*}$ <br\/><span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 58<\/span>"}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:38"},{"id":"243","post_id":"717","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["111"]]],"list":[{"point":10,"width":50,"type_input":"","ques":"Th\u01b0\u01a1ng c\u1ee7a s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 v\u00e0 9 l\u00e0: _input_","hint":"T\u00ecm s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 r\u1ed3i t\u00ecm th\u01b0\u01a1ng c\u1ee7a s\u1ed1 \u0111\u00f3 v\u1edbi 9","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> T\u00ecm s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 <br\/> T\u00ecm th\u01b0\u01a1ng c\u1ee7a s\u1ed1 \u0111\u00f3 v\u1edbi 9 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> S\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 l\u00e0: 999 <br\/> Th\u01b0\u01a1ng c\u1ee7a s\u1ed1 \u0111\u00f3 v\u1edbi 9 l\u00e0: <br\/> 999 : 9 = 111 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 111<\/span>"}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:39"}]}