90x-180=450

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Solution for 90x-180=450 equation: 



90x-180=450

We move all terms to the left:

90x-180-(450)=0

We add all the numbers together, and all the variables

90x-630=0

We move all terms containing x to the left, all other terms to the right

90x=630

x=630/90

x=7

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