Problema Solution
When 189 is subtracted from five times a certain number the result is equal to 2, one half of the original number, Fine the number.
Answer provided by our tutors
let 'x' be the original number
5*x - 189 = (2 1/2)*x
5*x - 189 = 5x/2 multiply both sides by 2
10x - 378 = 5x
10x - 5x = 378
5x = 378
x = 378/5
x = 75.6
the original number is 75.6.