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0.3x+0.7x=3.0
We move all terms to the left:
0.3x+0.7x-(3.0)=0
We add all the numbers together, and all the variables
0.3x+0.7x-3=0
We add all the numbers together, and all the variables
x-3=0
We move all terms containing x to the left, all other terms to the right
x=3
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