x+90=2x-(0.4*2x)

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Solution for x+90=2x-(0.4*2x) equation: 



x+90=2x-(0.4*2x)

We move all terms to the left:

x+90-(2x-(0.4*2x))=0

We add all the numbers together, and all the variables

x-(2x-(+0.4*2x))+90=0



We calculate terms in parentheses: -(2x-(+0.4*2x)), so:

2x-(+0.4*2x)

We get rid of parentheses

2x-0.4*2x

Back to the equation:

-(2x-0.4*2x)



We add all the numbers together, and all the variables

x-(+2x-0.4*2x)+90=0

We get rid of parentheses

x-2x+0.4*2x+90=0

We add all the numbers together, and all the variables

-1x+0.4*2x+90=0

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

-1x+0.4*2x=-90

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