78=5(a-2)+6(3a+7)

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Solution for 78=5(a-2)+6(3a+7) equation: 



78=5(a-2)+6(3a+7)

We move all terms to the left:

78-(5(a-2)+6(3a+7))=0



We calculate terms in parentheses: -(5(a-2)+6(3a+7)), so:

5(a-2)+6(3a+7)

We multiply parentheses

5a+18a-10+42

We add all the numbers together, and all the variables

23a+32

Back to the equation:

-(23a+32)



We get rid of parentheses

-23a-32+78=0

We add all the numbers together, and all the variables

-23a+46=0

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

-23a=-46

a=-46/-23

a=+2

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