3a-30=-1.5(a+7.7)

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Solution for 3a-30=-1.5(a+7.7) equation: 



3a-30=-1.5(a+7.7)

We move all terms to the left:

3a-30-(-1.5(a+7.7))=0



We calculate terms in parentheses: -(-1.5(a+7.7)), so:

-1.5(a+7.7)

We multiply parentheses

-1.5a-11.55

Back to the equation:

-(-1.5a-11.55)



We get rid of parentheses

3a+1.5a+11.55-30=0

We add all the numbers together, and all the variables

4.5a-18.45=0

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

4.5a=18.45

a=18.45/4.5

a=4+0.45/4.5

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