1. 15z -20 = 6z - (z+2)+(-z+3)
2. x - (2x+1) = 8 - (31+3)
3. (5-3x)- (-4x+6) = (8x+11) - (3x-6)
4. 7(3z+1) + 8(2z-3) = 4(3z -1) -7(z -4)
5. 4 (x-2) - 5(2x - 6) = 8(x+1) -3(2x+3)
6. -2y-3- (-4y+5+(-y+2 - (3y-1)+2y-5)) = - (y- 4)
7. 7(x-4)²-3(x+5)² =4(x+1)(x-1)-2
8. 3(x-2)²(x+5) = 3(x+1)²(x-1)+3
9. 6 x + 4 = 6 - 5 x
7 7
10. 3x + 2 = x + 8
5 5
11. 6 x _ 2 = 5 + 3 _ 7 x
5 3 3 2 4
12. 8 + 7 z = 3 _ 3 z
3 2 5 7
13. 5 y + 3 _ 1 + 2 = y + 5 _ 7 y
4 5 4 3 4
14. 6y + 9 _ 2y + 1 = 5 + 6 y _ 2
3 3 7
15. 8y _ 7 + 8 _ 5 y_ 1 = 3 y + 8 _ 1 + 2 y
3 2 4 4
16. 8 _ 7 x + 3 x _ 3 = 5 x + 4 + 8 x
3 5 3 5
17. x - 1 = 2(x-1)
7 14
18. 2x - 6 = -5 - 6x
2 4
19. 2(y-1) + y+5 = 2 _ 5 (x-2)
5 3 3 5
20. 9 + 5 x _ 3 _ 4 x = 2 x - 7 + 4 x
2 5 3
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