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-3-7x=7+15
We move all terms to the left:
-3-7x-(7+15)=0
We add all the numbers together, and all the variables
-7x-3-22=0
We add all the numbers together, and all the variables
-7x-25=0
We move all terms containing x to the left, all other terms to the right
-7x=25
x=25/-7
x=-3+4/7
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