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12.4y+7.3=230.5
We move all terms to the left:
12.4y+7.3-(230.5)=0
We add all the numbers together, and all the variables
12.4y-223.2=0
We move all terms containing y to the left, all other terms to the right
12.4y=223.2
y=223.2/12.4
y=18+-2.8421709430404E-14/12.4
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