90=-20(1+2x)+18x

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Solution for 90=-20(1+2x)+18x equation: 



90=-20(1+2x)+18x

We move all terms to the left:

90-(-20(1+2x)+18x)=0

We add all the numbers together, and all the variables

-(-20(2x+1)+18x)+90=0



We calculate terms in parentheses: -(-20(2x+1)+18x), so:

-20(2x+1)+18x

We add all the numbers together, and all the variables

18x-20(2x+1)

We multiply parentheses

18x-40x-20

We add all the numbers together, and all the variables

-22x-20

Back to the equation:

-(-22x-20)



We get rid of parentheses

22x+20+90=0

We add all the numbers together, and all the variables

22x+110=0

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

22x=-110

x=-110/22

x=-5

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