4(180-x)=90-x

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Solution for 4(180-x)=90-x equation: 



4(180-x)=90-x

We move all terms to the left:

4(180-x)-(90-x)=0

We add all the numbers together, and all the variables

4(-1x+180)-(-1x+90)=0

We multiply parentheses

-4x-(-1x+90)+720=0

We get rid of parentheses

-4x+1x-90+720=0

We add all the numbers together, and all the variables

-3x+630=0

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

-3x=-630

x=-630/-3

x=+210

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