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(2x/5)-4=12
We simplify the equation to the form, which is simple to understand
(2x/5)-4=12
Remove unnecessary parentheses
+ 0.4x-4=12
We move all terms containing x to the left and all other terms to the right.
+ 0.4x=+12+4
We simplify left and right side of the equation.
+ 0.4x=+16
We divide both sides of the equation by 0.4 to get x.
x=40
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