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15+1.75x=7.50+2.25x
We move all terms to the left:
15+1.75x-(7.50+2.25x)=0
We add all the numbers together, and all the variables
1.75x-(2.25x+7.5)+15=0
We get rid of parentheses
1.75x-2.25x-7.5+15=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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