0.8a-0.1a=a-2.5

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Solution for 0.8a-0.1a=a-2.5 equation: 



0.8a-0.1a=a-2.5

We move all terms to the left:

0.8a-0.1a-(a-2.5)=0

We add all the numbers together, and all the variables

0.7a-(a-2.5)=0

We get rid of parentheses

0.7a-a+2.5=0

We add all the numbers together, and all the variables

-0.3a+2.5=0

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

-0.3a=-2.5

a=-2.5/-0.3

a=8+0.1/0.3

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