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0.2x+0.8(40-x)=18.2
We move all terms to the left:
0.2x+0.8(40-x)-(18.2)=0
We add all the numbers together, and all the variables
0.2x+0.8(-1x+40)-(18.2)=0
We add all the numbers together, and all the variables
0.2x+0.8(-1x+40)-18.2=0
We multiply parentheses
0.2x-0.8x+32-18.2=0
We add all the numbers together, and all the variables
-0.6x+13.8=0
We move all terms containing x to the left, all other terms to the right
-0.6x=-13.8
x=-13.8/-0.6
x=23+1.7763568394E-15/0.6
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