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a+7.20=1.50
We move all terms to the left:
a+7.20-(1.50)=0
We add all the numbers together, and all the variables
a+7.20-(1.5)=0
We add all the numbers together, and all the variables
a+5.7=0
We move all terms containing a to the left, all other terms to the right
a=-5.7
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