200=20(a+18)

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Solution for 200=20(a+18) equation: 



200=20(a+18)

We move all terms to the left:

200-(20(a+18))=0



We calculate terms in parentheses: -(20(a+18)), so:

20(a+18)

We multiply parentheses

20a+360

Back to the equation:

-(20a+360)



We get rid of parentheses

-20a-360+200=0

We add all the numbers together, and all the variables

-20a-160=0

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

-20a=160

a=160/-20

a=-8

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