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3(+4)+5x=-20
We move all terms to the left:
3(+4)+5x-(-20)=0
We add all the numbers together, and all the variables
5x+34-(-20)=0
We add all the numbers together, and all the variables
5x+54=0
We move all terms containing x to the left, all other terms to the right
5x=-54
x=-54/5
x=-10+4/5
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