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1.3x-8.15-0.8x=5.2
We move all terms to the left:
1.3x-8.15-0.8x-(5.2)=0
We add all the numbers together, and all the variables
0.5x-13.35=0
We move all terms containing x to the left, all other terms to the right
0.5x=13.35
x=13.35/0.5
x=26+0.35/0.5
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