3.4=-0.85(a+3)

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Solution for 3.4=-0.85(a+3) equation: 



3.4=-0.85(a+3)

We move all terms to the left:

3.4-(-0.85(a+3))=0



We calculate terms in parentheses: -(-0.85(a+3)), so:

-0.85(a+3)

We multiply parentheses

-0.85a-2.55

Back to the equation:

-(-0.85a-2.55)



We get rid of parentheses

0.85a+2.55+3.4=0

We add all the numbers together, and all the variables

0.85a+5.95=0

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

0.85a=-5.95

a=-5.95/0.85

a=-7

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