Question

решить уравнения
1) 4x + 5 = 2x-7
2) 5x - 7 =13
3) 3 (x+2) = 2 (x +2 )
4) 2x - 4 =8 +2x
5) 4x +6 =2 (2x+3)

Answer 1

1) 4х+5=2х-7
4х-2х= -7-5
2х= -12
х= -6


2)5х-7=13
5х=20
х=4

3)3х+6=2х+4
3х+2х=4-6
5х= -2
х= -0,4