21.5+7.5a=-7(6.5a-2.5)

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Solution for 21.5+7.5a=-7(6.5a-2.5) equation: 



21.5+7.5a=-7(6.5a-2.5)

We move all terms to the left:

21.5+7.5a-(-7(6.5a-2.5))=0



We calculate terms in parentheses: -(-7(6.5a-2.5)), so:

-7(6.5a-2.5)

We multiply parentheses

-42a+17.5

Back to the equation:

-(-42a+17.5)



We get rid of parentheses

7.5a+42a-17.5+21.5=0

We add all the numbers together, and all the variables

49.5a+4=0

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

49.5a=-4

a=-4/49.5

a=-4/49.5

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