Question 576257
Three times one number minus a second is 8, and the sum of the number is 12. Find the numbers.
sol:
let x = one number 
y  = other number 
form the equations to find x and y
(3 * x) - y = 8 ---------(1)
x + y = 12----------(2)
solve 1 & 2 ,you will get the required nos.