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30=90x+35
We move all terms to the left:
30-(90x+35)=0
We get rid of parentheses
-90x-35+30=0
We add all the numbers together, and all the variables
-90x-5=0
We move all terms containing x to the left, all other terms to the right
-90x=5
x=5/-90
x=-1/18
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