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4.9=0.7a
We move all terms to the left:
4.9-(0.7a)=0
We add all the numbers together, and all the variables
-(+0.7a)+4.9=0
We get rid of parentheses
-0.7a+4.9=0
We move all terms containing a to the left, all other terms to the right
-0.7a=-4.9
a=-4.9/-0.7
a=7+8.881784197E-16/0.7
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