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0.07x+0.4=0.05
We move all terms to the left:
0.07x+0.4-(0.05)=0
We add all the numbers together, and all the variables
0.07x+0.35=0
We move all terms containing x to the left, all other terms to the right
0.07x=-0.35
x=-0.35/0.07
x=-4+0.07/0.07
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