Question

3(x+5)=7-5x решите с проверкой

Answer 1

3(x+5)=7-5x
3x+15=7-5x
8x=7-15
8x=-8
x=-1

Проверка:
3*4=7+5
12=12 

Answer 2

3(х+5)=7-5х
3х+15-7+5х=0
8х=-8
х=-1
проверяем
3(-1+5)=7-5*(-1)
12=7+5
12=12