2 (x+5) - 3=9

7+4 (x+1) = 15

X+2 (x+7) = 8

2x+2 (x+3) = 10

3 (x-2) - 5x=2

1) 2 (x+5) - 3=9, 2 х+10-3=9,2 х=9+3-10, 2 х=2, х=1

2) 7+4 (x+1) = 15

7+4 х+4=15

4 х=15-7-4,

4 х=4,

х=1

3) х+2 (x+7) = 8,

х+2 х+14=8,

3 х = 8 - 14,

3 х = - 6,

х = - 2

4) 2x+2 (x+3) = 10,

2 х + 2 х + 6 = 10,

4 х = 10-6

4 х = 4

х = 1

5) 3 (x-2) - 5x=2

3 х - 6 - 5 х = 2

3 х - 5 х = 2 + 6

- 2 х = 8

х = 8: (-2)

х = - 4