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5(4-x)=30
We move all terms to the left:
5(4-x)-(30)=0
We add all the numbers together, and all the variables
5(-1x+4)-30=0
We multiply parentheses
-5x+20-30=0
We add all the numbers together, and all the variables
-5x-10=0
We move all terms containing x to the left, all other terms to the right
-5x=10
x=10/-5
x=-2
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