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6x+7(2x+3)=-19
We move all terms to the left:
6x+7(2x+3)-(-19)=0
We add all the numbers together, and all the variables
6x+7(2x+3)+19=0
We multiply parentheses
6x+14x+21+19=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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