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10x-10+30=12-4
We move all terms to the left:
10x-10+30-(12-4)=0
We add all the numbers together, and all the variables
10x-10+30-8=0
We add all the numbers together, and all the variables
10x+12=0
We move all terms containing x to the left, all other terms to the right
10x=-12
x=-12/10
x=-1+1/5
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