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130=7x+x
We move all terms to the left:
130-(7x+x)=0
We add all the numbers together, and all the variables
-(+8x)+130=0
We get rid of parentheses
-8x+130=0
We move all terms containing x to the left, all other terms to the right
-8x=-130
x=-130/-8
x=16+1/4
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