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0.3x+0.5x+0.5=0.7
We move all terms to the left:
0.3x+0.5x+0.5-(0.7)=0
We add all the numbers together, and all the variables
0.8x-0.2=0
We move all terms containing x to the left, all other terms to the right
0.8x=0.2
x=0.2/0.8
x=0.2/0.8
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