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5 - 3[x-7(2x-6)] - 9/8
Distribute innermost parenthesis first
-7(2x-6) is the same as -14x + 42
5 - 3(x - 14x + 42) - 9/8
Subtract x terms
5 - 3(-13x + 42) - 9/8
Distribute the -3
5 + 39x - 126 - 9/8
Rearrange
39x + 5 - 126 - 9/8
39x - 121 - 9/8
Convert 121 into a fraction with common denominator
39x - 121(8/8) - 9/8
39x - 968/8 - 9/8
39x - 977/8
OR
39x - 122.125
OR
39x - 122 1/8
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