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1/2 x = 9-3
1/2 x = 6
x = 12
7) 1/3 x - 5 = 10
1/3 x = 15
x = 45
8) 1/4 y + 1/2 = 7
1/4 y = 13/2
y = 26
9) y/2 - y/3 = (y-1)/3
---------------------- x 6
3y - 2y = 2y -3
- y = -3
y = 3
10) 1/2 (4-x) - 1/3 (1+x) = 1/4
----------------------------------- x 12
6(4-x) - 4(1+x) = 3
24 - 6x - 4 - 4x = 3
-10x = -17
x = 1 7/10