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-3x+4=-20+x
We move all terms to the left:
-3x+4-(-20+x)=0
We add all the numbers together, and all the variables
-3x-(x-20)+4=0
We get rid of parentheses
-3x-x+20+4=0
We add all the numbers together, and all the variables
-4x+24=0
We move all terms containing x to the left, all other terms to the right
-4x=-24
x=-24/-4
x=+6
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