30=90-5x

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Solution for 30=90-5x equation: 



30=90-5x

We move all terms to the left:

30-(90-5x)=0

We add all the numbers together, and all the variables

-(-5x+90)+30=0

We get rid of parentheses

5x-90+30=0

We add all the numbers together, and all the variables

5x-60=0

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

5x=60

x=60/5

x=12

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