Toán Bài 1 Tìm x 1/ 156 -(x+61 )=82 2/ ( x+73)-26=76 3/ 124 +(118-x)=217 4/ 7x-8=713 5/ x-36:18=12 6/ (x-36):18=12 7/ (x-47)-115=0 8/ 315+(146-x)=401 9/ (6 26/07/2021 By Athena Bài 1 Tìm x 1/ 156 -(x+61 )=82 2/ ( x+73)-26=76 3/ 124 +(118-x)=217 4/ 7x-8=713 5/ x-36:18=12 6/ (x-36):18=12 7/ (x-47)-115=0 8/ 315+(146-x)=401 9/ (6x-39):3=201
Bài 1: 1/ 156 – (x + 61) = 82 <=> x + 61 = 156 – 82 <=> x + 61 = 74 <=> x = 74 – 61 <=> x = 13 2/ (x + 73) – 26 = 76 <=> x + 73 = 76 + 26 <=> x + 73 = 102 <=> x = 102 – 73 <=> x = 29 3/ 124 + (118 – x) = 217 <=> 118 – x = 217 – 124 <=> 118 – x = 93 <=> x = 118 – 93 <=> x = 25 4/ 7x – 8 = 713 <=> 7x = 713 + 8 <=> 7x = 721 <=> x = 721 : 7 <=> x = 13 5/ x – 36 : 18 = 12 <=> x – 2 = 12 <=> x = 12 + 2 <=> x = 14 6/ (x – 36) : 18 = 12 <=> x – 36 = 12 x 18 <=> x – 36 = 216 <=> x = 216 + 36 <=> x = 252 7/ (x – 47) – 115 = 0 <=> x – 47 = 115 <=> x = 115 + 47 <=> x = 162 8/ 315 + (146 – x) = 401 <=> 146 – x = 401 – 315 <=> 146 – x = 86 <=> x = 146 – 86 <=> x = 60 9/ (6x – 39) : 3 = 201 <=> 6x – 39 = 201 x 3 <=> 6x – 39 = 603 <=> 6x = 603 + 39 <=> 6x = 642 <=> x = 642 : 6 <=> x = 107 Trả lời