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-3.8x-1.3x=-19.89
We move all terms to the left:
-3.8x-1.3x-(-19.89)=0
We add all the numbers together, and all the variables
-5.1x+19.89=0
We move all terms containing x to the left, all other terms to the right
-5.1x=-19.89
x=-19.89/-5.1
x=3+2.8867924528302/3.2075471698113
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