Question

решите уравнение! 2(5+х)=7-х

Answer 1

2(5+х) = 7-х
10+2х = 7-х
2х+х = 7-10
3х=-3
х= -3/3
х= -1

проверим
2(5+(-1)) = 7- (-1)
2*4 = 7+1
8=8

Answer 2

2(5+x)=7-x 10+2x=7-x 2x+x=7-10 3x=-3 x=-3÷3 x=-1