-2.1a-7.5=8.9a+7.5

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Solution for -2.1a-7.5=8.9a+7.5 equation: 



-2.1a-7.5=8.9a+7.5

We move all terms to the left:

-2.1a-7.5-(8.9a+7.5)=0

We get rid of parentheses

-2.1a-8.9a-7.5-7.5=0

We add all the numbers together, and all the variables

-11a-15=0

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

-11a=15

a=15/-11

a=-1+4/11

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