Question

2(x-2)-1=5(x-2)-7 Решите уравнение

Answer 1

2х-4-1=5х-10-7 2х-5х=4+1-10-7 -3х=-12 х=4

Answer 2

2(x-2)-1=5(x-2)-7
2x-4-1=5x-10-7
2x-5=5x-17       /+17
2x-5+17=5x-17+17
2x+12=5x        /-2x
2x-2x+12=5x-2x
12=3x     /:3
4=x

x=4
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