-90=45-5x

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Solution for -90=45-5x equation: 



-90=45-5x

We move all terms to the left:

-90-(45-5x)=0

We add all the numbers together, and all the variables

-(-5x+45)-90=0

We get rid of parentheses

5x-45-90=0

We add all the numbers together, and all the variables

5x-135=0

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

5x=135

x=135/5

x=27

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