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

0 bình luận về “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”

1. 1,x=13

   2,x=29

   3,x=25

   4,x=103

   5,x=14

   6,x=252

   7,x=162

   8,x=60

   9,x=107

    

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2. 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

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