To solve this equation, we need to first distribute the 20% over the x term:
0.4x - (20/100)x = 3/5
Simplifying the equation, we get:
0.4x - 0.2x = 3/5
Combining like terms, we have:
0.2x = 3/5
To solve for x, we need to get rid of the coefficient 0.2, so we divide both sides of the equation by 0.2:
(0.2x)/(0.2) = (3/5)/(0.2)
Simplifying further, we get:
x = (3/5)/(0.2)
To divide fractions, we multiply the numerator by the reciprocal of the denominator:
x = (3/5) * (1/0.2)
x = (3/1) * (5/0.2)
x = 15/0.2
Finally, we can simplify the fraction by dividing the numerator by the denominator:
x = 75/1
x = 75
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