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4x+8x=19.3
We move all terms to the left:
4x+8x-(19.3)=0
We add all the numbers together, and all the variables
12x-19.3=0
We move all terms containing x to the left, all other terms to the right
12x=19.3
x=19.3/12
x=1+5.6153846153846/9.2307692307692
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