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-7x+4(x-3)=-15
We move all terms to the left:
-7x+4(x-3)-(-15)=0
We add all the numbers together, and all the variables
-7x+4(x-3)+15=0
We multiply parentheses
-7x+4x-12+15=0
We add all the numbers together, and all the variables
-3x+3=0
We move all terms containing x to the left, all other terms to the right
-3x=-3
x=-3/-3
x=1
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