20x+180=30x+90

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Solution for 20x+180=30x+90 equation: 



20x+180=30x+90

We move all terms to the left:

20x+180-(30x+90)=0

We get rid of parentheses

20x-30x-90+180=0

We add all the numbers together, and all the variables

-10x+90=0

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

-10x=-90

x=-90/-10

x=+9

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