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3x+7=9x-1/2
We move all terms to the left:
3x+7-(9x-1/2)=0
We add all the numbers together, and all the variables
3x-(+9x-1/2)+7=0
We get rid of parentheses
3x-9x+7+1/2=0
We multiply all the terms by the denominator
3x*2-9x*2+1+7*2=0
We add all the numbers together, and all the variables
3x*2-9x*2+15=0
Wy multiply elements
6x-18x+15=0
We add all the numbers together, and all the variables
-12x+15=0
We move all terms containing x to the left, all other terms to the right
-12x=-15
x=-15/-12
x=1+1/4
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