2a-18.8+a-2.5+a+2.2+18.5=90

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Solution for 2a-18.8+a-2.5+a+2.2+18.5=90 equation: 



2a-18.8+a-2.5+a+2.2+18.5=90

We move all terms to the left:

2a-18.8+a-2.5+a+2.2+18.5-(90)=0

We add all the numbers together, and all the variables

4a-90.6=0

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

4a=90.6

a=90.6/4

a=22+1/1.5384615384615

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