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15+4.50x=12.50+5x
We move all terms to the left:
15+4.50x-(12.50+5x)=0
We add all the numbers together, and all the variables
4.50x-(5x+12.5)+15=0
We get rid of parentheses
4.50x-5x-12.5+15=0
We add all the numbers together, and all the variables
-0.5x+2.5=0
We move all terms containing x to the left, all other terms to the right
-0.5x=-2.5
x=-2.5/-0.5
x=+5
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