2×(х+5)+7×(3х-7)=53

Question

2×(х+5)+7×(3х-7)=53

Answer 1

2(x+5)+7(3x-7)=53

2x+10+21x-49=53

23x=92

x=92/23

x=4

Ответ:4

Удачи)))

Answer 2

2*(х+5)+7*(3х-7)=53
2*х+5+7*3х-7=53
2х+10+21х-49=53
2х+21х=53-10+49
23х=92
х=92:23
х=4