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7+4x=-2x-5
We move all terms to the left:
7+4x-(-2x-5)=0
We get rid of parentheses
4x+2x+5+7=0
We add all the numbers together, and all the variables
6x+12=0
We move all terms containing x to the left, all other terms to the right
6x=-12
x=-12/6
x=-2
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