Answer:
x = 23
Explanation:
x/20 + 20 ( -2/5 )/20 = 3/4
combine fractions with common denominator
x - 8/20 = 3/4
Multiply all terms by the same value to eliminate fraction denominators
20 . x - 8/20 = 3/4 = 20. 3/4
Cancel multiplied terms that are in the denominator
x - 8 = 20 . 3/4
Multiply the numbers
x - 8 = 15
Add 8 to both sides of the equation
x - 8 + 8 = 15 + 8
simplify
add the numbers
x = 23