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0.02x+0.07(10.000-x)=630
We move all terms to the left:
0.02x+0.07(10.000-x)-(630)=0
We add all the numbers together, and all the variables
0.02x+0.07(-1x+10)-630=0
We multiply parentheses
0.02x-0.07x+0.7-630=0
We add all the numbers together, and all the variables
-0.05x-629.3=0
We move all terms containing x to the left, all other terms to the right
-0.05x=629.3
x=629.3/-0.05
x=-12585+0.049999999999955/0.05
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