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4x+5=-7x-16
We move all terms to the left:
4x+5-(-7x-16)=0
We get rid of parentheses
4x+7x+16+5=0
We add all the numbers together, and all the variables
11x+21=0
We move all terms containing x to the left, all other terms to the right
11x=-21
x=-21/11
x=-1+10/11
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