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-3(4x-5)=30
We move all terms to the left:
-3(4x-5)-(30)=0
We multiply parentheses
-12x+15-30=0
We add all the numbers together, and all the variables
-12x-15=0
We move all terms containing x to the left, all other terms to the right
-12x=15
x=15/-12
x=-1+1/4
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