Question

x+100+12=200+12

Answer 1

x + 100 + 12 = 200 + 12

x + 100 + 12 = 212

x + 100         = 212 - 12

x + 100         = 200

x                  = 200 - 100

x                  = 100

Vậy x = 100

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Answer 2

x+100+12=200+12

x+100+12=212

x+100=212-12

x+100=200

x=200-100

x=100

Answer 3

x + 100 + 12 = 200 + 12

x + 100 + 12 = 212

x + 100        = 212 - 12

x + 100        = 200

                 x = 200 - 100

                 x  = 100

Answer 4

x + 100 + 12 = 200 + 12

x + 112 = 212

x = 212 - 112

x = 100

Answer 5

 x+100+12=200+12

x+100+12=212

x+100=212-12

x+100=200

x=200-100

x=100