Question

1) 7x + 3 = 30 - 2x
2) 3x + 6 = 2(2x - 7) + x
3) 6.2(3 - 2x) = 20 - (12, 4x + 1.4)

Answer 1

1)7х+3=30-2х
7х+2х=30-3
9х=27
х=27/9=3

2)3х+6=2(2х-7)
3х+6=4х-14
3х-4х=-14-6
-х=-20
х=20

3)6.2(3-2х)=20-(12.4х+1.4)
18.6-12.4х=20-12.4х-1.4
18.6=18.6
хєR