0.78+0.1a=-1.8(a+2.1)

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Solution for 0.78+0.1a=-1.8(a+2.1) equation: 



0.78+0.1a=-1.8(a+2.1)

We move all terms to the left:

0.78+0.1a-(-1.8(a+2.1))=0



We calculate terms in parentheses: -(-1.8(a+2.1)), so:

-1.8(a+2.1)

We multiply parentheses

-1.8a-3.78

Back to the equation:

-(-1.8a-3.78)



We get rid of parentheses

0.1a+1.8a+3.78+0.78=0

We add all the numbers together, and all the variables

1.9a+4.56=0

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

1.9a=-4.56

a=-4.56/1.9

a=-2+0.76/1.9

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