x=0.4(2x+10)

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Solution for x=0.4(2x+10) equation: 



x=0.4(2x+10)

We move all terms to the left:

x-(0.4(2x+10))=0



We calculate terms in parentheses: -(0.4(2x+10)), so:

0.4(2x+10)

We multiply parentheses

0.8x+4

Back to the equation:

-(0.8x+4)



We get rid of parentheses

x-0.8x-4=0

We add all the numbers together, and all the variables

0.2x-4=0

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

0.2x=4

x=4/0.2

x=20

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