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13.5=4.5-4x
We move all terms to the left:
13.5-(4.5-4x)=0
We add all the numbers together, and all the variables
-(-4x+4.5)+13.5=0
We get rid of parentheses
4x-4.5+13.5=0
We add all the numbers together, and all the variables
4x+9=0
We move all terms containing x to the left, all other terms to the right
4x=-9
x=-9/4
x=-2+1/4
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