Solve for x
x\leq 3
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9x-7-8x\leq -4
Subtract 8x from both sides.
x-7\leq -4
Combine 9x and -8x to get x.
x\leq -4+7
Add 7 to both sides.
x\leq 3
Add -4 and 7 to get 3.
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