1. 42 - 2х = 5х
– 2x – 5x = – 42
-7x = -42
x = 6
2. 3х + 18= 5х
3x – 5x = – 18
-2x = -18
x = 9
3. 5у - 22= 3у
5y – 3y = 22
2y = 22
y = 11
4. 3х + 38= 5х + 18
3x – 5x = 18 – 38
-2x = -20
x = 10
5. 7у - 5= 3у +3
7y – 3y = 3 + 5
4y = 8
y = 2
6. 6х - 45 = 2х - 17
6x – 2x = – 17 + 45
4x = 28
x = 7
7. 3 - 3у = 7 - 13у
– 3y + 13y = 7 – 3
10y = 4
y = 0.4
8. 3х- 2 = 7 - х
x + x = 7 + 2
2x = 9
x = 4.5
1. 42 - 2х = 5х
– 2x – 5x = – 42
-7x = -42
x = 6
2. 3х + 18= 5х
3x – 5x = – 18
-2x = -18
x = 9
3. 5у - 22= 3у
5y – 3y = 22
2y = 22
y = 11
4. 3х + 38= 5х + 18
3x – 5x = 18 – 38
-2x = -20
x = 10
5. 7у - 5= 3у +3
7y – 3y = 3 + 5
4y = 8
y = 2
6. 6х - 45 = 2х - 17
6x – 2x = – 17 + 45
4x = 28
x = 7
7. 3 - 3у = 7 - 13у
– 3y + 13y = 7 – 3
10y = 4
y = 0.4
8. 3х- 2 = 7 - х
x + x = 7 + 2
2x = 9
x = 4.5