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4(5x+9)=-19+15
We move all terms to the left:
4(5x+9)-(-19+15)=0
We add all the numbers together, and all the variables
4(5x+9)-(-4)=0
We add all the numbers together, and all the variables
4(5x+9)+4=0
We multiply parentheses
20x+36+4=0
We add all the numbers together, and all the variables
20x+40=0
We move all terms containing x to the left, all other terms to the right
20x=-40
x=-40/20
x=-2
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