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xx2.20+2xx1.30=14.4
We move all terms to the left:
xx2.20+2xx1.30-(14.4)=0
We add all the numbers together, and all the variables
xx2.20+2xx1.30-14.4=0
We move all terms containing x to the left, all other terms to the right
xx2.20+2xx1.30=14.4
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