80=(8+a)/2

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Solution for 80=(8+a)/2 equation: 



80=(8+a)/2

We move all terms to the left:

80-((8+a)/2)=0

We add all the numbers together, and all the variables

-((a+8)/2)+80=0

We multiply all the terms by the denominator


-((a+8)+80*2)=0



We calculate terms in parentheses: -((a+8)+80*2), so:

(a+8)+80*2

We add all the numbers together, and all the variables

(a+8)+160

We get rid of parentheses

a+8+160

We add all the numbers together, and all the variables

a+168

Back to the equation:

-(a+168)



We get rid of parentheses

-a-168=0

We add all the numbers together, and all the variables

-1a-168=0

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

-a=168

a=168/-1

a=-168

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