0.5a+0.9(18-a)=12.2

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Solution for 0.5a+0.9(18-a)=12.2 equation: 



0.5a+0.9(18-a)=12.2

We move all terms to the left:

0.5a+0.9(18-a)-(12.2)=0

We add all the numbers together, and all the variables

0.5a+0.9(-1a+18)-(12.2)=0

We add all the numbers together, and all the variables

0.5a+0.9(-1a+18)-12.2=0

We multiply parentheses

0.5a-0.9a+16.2-12.2=0

We add all the numbers together, and all the variables

-0.4a+4=0

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

-0.4a=-4

a=-4/-0.4

a=+10

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