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9=1.5+0.5x
We move all terms to the left:
9-(1.5+0.5x)=0
We add all the numbers together, and all the variables
-(0.5x+1.5)+9=0
We get rid of parentheses
-0.5x-1.5+9=0
We add all the numbers together, and all the variables
-0.5x+7.5=0
We move all terms containing x to the left, all other terms to the right
-0.5x=-7.5
x=-7.5/-0.5
x=+15
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