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7x+13=-3-7
We move all terms to the left:
7x+13-(-3-7)=0
We add all the numbers together, and all the variables
7x+13-(-10)=0
We add all the numbers together, and all the variables
7x+23=0
We move all terms containing x to the left, all other terms to the right
7x=-23
x=-23/7
x=-3+2/7
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