(29+2х)/3=39
29+2х=39*3
29+2х=117
2х=117-29
2х=88
х=88:2
х=44
(13х-21)*18=117324
раскроем скобки
234x-378 = 117324
234x-117702 = 0
234x = 117702
x = 503
4*(x+2)-30=10
4x + 8 – 30 = 10
4x = 10 + 30 – 8
4x = 32
x = 8
(29+2х)/3=39
29+2х=39*3
29+2х=117
2х=117-29
2х=88
х=88:2
х=44
(13х-21)*18=117324
раскроем скобки
234x-378 = 117324
234x-117702 = 0
234x = 117702
x = 503
4*(x+2)-30=10
4x + 8 – 30 = 10
4x = 10 + 30 – 8
4x = 32
x = 8