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-20
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-20
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12x-20-6\times 2x
Use the distributive property to multiply 4 by 3x-5.
12x-20-12x
Multiply 6 and 2 to get 12.
-20
Combine 12x and -12x to get 0.
4\left(3x-5-3x\right)
Factor out 4.
-20
Simplify.
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