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55-4(4-x)=20
We move all terms to the left:
55-4(4-x)-(20)=0
We add all the numbers together, and all the variables
-4(-1x+4)+55-20=0
We add all the numbers together, and all the variables
-4(-1x+4)+35=0
We multiply parentheses
4x-16+35=0
We add all the numbers together, and all the variables
4x+19=0
We move all terms containing x to the left, all other terms to the right
4x=-19
x=-19/4
x=-4+3/4
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