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0.8x+6.24=13.7
We move all terms to the left:
0.8x+6.24-(13.7)=0
We add all the numbers together, and all the variables
0.8x-7.46=0
We move all terms containing x to the left, all other terms to the right
0.8x=7.46
x=7.46/0.8
x=9+0.26/0.8
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