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30x-25=90x+3
We move all terms to the left:
30x-25-(90x+3)=0
We get rid of parentheses
30x-90x-3-25=0
We add all the numbers together, and all the variables
-60x-28=0
We move all terms containing x to the left, all other terms to the right
-60x=28
x=28/-60
x=-7/15
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