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8.9a+7.4=342.93
We move all terms to the left:
8.9a+7.4-(342.93)=0
We add all the numbers together, and all the variables
8.9a-335.53=0
We move all terms containing a to the left, all other terms to the right
8.9a=335.53
a=335.53/8.9
a=37+2.79372197309/3.99103139013
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