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0.05x+0.02x=0.21
We move all terms to the left:
0.05x+0.02x-(0.21)=0
We add all the numbers together, and all the variables
0.07x-0.21=0
We move all terms containing x to the left, all other terms to the right
0.07x=0.21
x=0.21/0.07
x=2+0.07/0.07
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