0.3a+0.7(17-a)=7.9

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Solution for 0.3a+0.7(17-a)=7.9 equation: 



0.3a+0.7(17-a)=7.9

We move all terms to the left:

0.3a+0.7(17-a)-(7.9)=0

We add all the numbers together, and all the variables

0.3a+0.7(-1a+17)-(7.9)=0

We add all the numbers together, and all the variables

0.3a+0.7(-1a+17)-7.9=0

We multiply parentheses

0.3a-0.7a+11.9-7.9=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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