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7.25=5+0.45x
We move all terms to the left:
7.25-(5+0.45x)=0
We add all the numbers together, and all the variables
-(0.45x+5)+7.25=0
We get rid of parentheses
-0.45x-5+7.25=0
We add all the numbers together, and all the variables
-0.45x+2.25=0
We move all terms containing x to the left, all other terms to the right
-0.45x=-2.25
x=-2.25/-0.45
x=+5
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