18=2(2a+5)

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Solution for 18=2(2a+5) equation: 



18=2(2a+5)

We move all terms to the left:

18-(2(2a+5))=0



We calculate terms in parentheses: -(2(2a+5)), so:

2(2a+5)

We multiply parentheses

4a+10

Back to the equation:

-(4a+10)



We get rid of parentheses

-4a-10+18=0

We add all the numbers together, and all the variables

-4a+8=0

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

-4a=-8

a=-8/-4

a=+2

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