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(1.8-0.4x)+(-x)=0
We simplify the equation to the form, which is simple to understand
(1.8-0.4x)+(-x)=0
Remove unnecessary parentheses
1.8-0.4x+(-x)=0
Remove unnecessary parentheses
+1.8-0.4x-x=0
We move all terms containing x to the left and all other terms to the right.
-0.4x-1x=0-1.8
We simplify left and right side of the equation.
-1.4x=-1.8
We divide both sides of the equation by -1.4 to get x.
x=1.28571428571
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