14(2х-3)-5(х+4)=2(3х+5)+5х
28х-42-5х-20=6х+10+5х
28х-5х-6х-5х=10+42+20
12х=72
х=72:12
х=6
28x-42-5x-20 = 6x+10+5x
28x-5x-5x-6x = 42+20+10
12x = 72 | : 12
x = 6
ответ: x = 6.
14(2х-3)-5(х+4)=2(3х+5)+5х
28х-42-5х-20=6х+10+5х
28х-5х-6х-5х=10+42+20
12х=72
х=72:12
х=6
28x-42-5x-20 = 6x+10+5x
28x-5x-5x-6x = 42+20+10
12x = 72 | : 12
x = 6
ответ: x = 6.