0.7a-4a+5=28

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Solution for 0.7a-4a+5=28 equation: 



0.7a-4a+5=28

We move all terms to the left:

0.7a-4a+5-(28)=0

We add all the numbers together, and all the variables

-3.3a-23=0

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

-3.3a=23

a=23/-3.3

a=-6+1/1.03125

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