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4(5x+3)=-3
We move all terms to the left:
4(5x+3)-(-3)=0
We add all the numbers together, and all the variables
4(5x+3)+3=0
We multiply parentheses
20x+12+3=0
We add all the numbers together, and all the variables
20x+15=0
We move all terms containing x to the left, all other terms to the right
20x=-15
x=-15/20
x=-3/4
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