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1=9x/7.5*5
We move all terms to the left:
1-(9x/7.5*5)=0
We add all the numbers together, and all the variables
-(+9x/7.5*5)+1=0
We get rid of parentheses
-9x/7.5*5+1=0
We multiply all the terms by the denominator
-9x+1*7.5*5=0
We add all the numbers together, and all the variables
-9x+37.5=0
We move all terms containing x to the left, all other terms to the right
-9x=-37.5
x=-37.5/-9
x=4+1/6
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