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4+7x=-20+30x
We move all terms to the left:
4+7x-(-20+30x)=0
We add all the numbers together, and all the variables
7x-(30x-20)+4=0
We get rid of parentheses
7x-30x+20+4=0
We add all the numbers together, and all the variables
-23x+24=0
We move all terms containing x to the left, all other terms to the right
-23x=-24
x=-24/-23
x=1+1/23
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