1) 4х-20=0
4х=20
х=20/4
х=5
2) 3х-5=4х+1
3х-4х=1+5
-х=6
х=-6
3) 2(х+7)=9-2х
2х+14=9-2х
2х+2х=9-14
4х=-5
х=-1,25
1)4x - 20 = 0
20: 4 = 5
x = 5
2) 3x - 5 = 4x + 1
3х - 4х=1 + 5
- х = 6х = -6
3) 2(х + 7)=9 - 2х2х + 14=9 - 2х2х + 2х = 9 - 144х = - 5x = -1,25
1) 4х-20=0
4х=20
х=20/4
х=5
2) 3х-5=4х+1
3х-4х=1+5
-х=6
х=-6
3) 2(х+7)=9-2х
2х+14=9-2х
2х+2х=9-14
4х=-5
х=-1,25
1)4x - 20 = 0
20: 4 = 5
x = 5
2) 3x - 5 = 4x + 1
3х - 4х=1 + 5
- х = 6
х = -6
3) 2(х + 7)=9 - 2х
2х + 14=9 - 2х
2х + 2х = 9 - 14
4х = - 5
x = -1,25