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13-42=4(x-1)-5
We move all terms to the left:
13-42-(4(x-1)-5)=0
We add all the numbers together, and all the variables
-(4(x-1)-5)-29=0
We calculate terms in parentheses: -(4(x-1)-5), so:We get rid of parentheses
4(x-1)-5
We multiply parentheses
4x-4-5
We add all the numbers together, and all the variables
4x-9
Back to the equation:
-(4x-9)
-4x+9-29=0
We add all the numbers together, and all the variables
-4x-20=0
We move all terms containing x to the left, all other terms to the right
-4x=20
x=20/-4
x=-5
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