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5(4-x)+2=42
We move all terms to the left:
5(4-x)+2-(42)=0
We add all the numbers together, and all the variables
5(-1x+4)+2-42=0
We add all the numbers together, and all the variables
5(-1x+4)-40=0
We multiply parentheses
-5x+20-40=0
We add all the numbers together, and all the variables
-5x-20=0
We move all terms containing x to the left, all other terms to the right
-5x=20
x=20/-5
x=-4
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