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x - 48 = 20
x = 20 + 48
x = 68
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9 - 15 = m - 13 + 16
- 6 = m + 3
- m = 3 + 6
- m = 9
m = - 9
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20 - 4 = y - 30
16 = y - 30
- y = - 30 - 16
- y = - 46
y = 46
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- 10 - p + 16 = - 30 + 8
6 - p = - 22
- p = - 22 - 6
- p = - 28
p = 28
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