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(9x-42+30)/2=x+15
We move all terms to the left:
(9x-42+30)/2-(x+15)=0
We add all the numbers together, and all the variables
(9x-12)/2-(x+15)=0
We get rid of parentheses
(9x-12)/2-x-15=0
We multiply all the terms by the denominator
(9x-12)-x*2-15*2=0
We add all the numbers together, and all the variables
(9x-12)-x*2-30=0
Wy multiply elements
(9x-12)-2x-30=0
We get rid of parentheses
9x-2x-12-30=0
We add all the numbers together, and all the variables
7x-42=0
We move all terms containing x to the left, all other terms to the right
7x=42
x=42/7
x=6
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