помогите решите

13-5x=8-2

4y+15=6y+17

5x + (3x-7=9

3y - (5-y) = 11

13 - 5x = 8 - 2

-5x = 6 - 13

-5x = - 7

x = - 7 / (-5)

x = 1.4

Ответ: 1.4

4y + 15 = 6y + 17

4y - 6y = 17 - 15

-2y = 2

y = 2 / (-2)

y = - 1

Ответ: - 1

5x + (3x-7) = 9

8x - 7 = 9

8x = 16

x = 16/8

x = 2

Ответ: 2

3y - (5 - y) = 11

3y - 5 + y = 11

4y = 11 + 5

4y = 16

y = 16/4

y = 4

Ответ: 4