Question

One number is five more than two times another. If there sum is decreased by one, the result is sixteen. Find the numbers.

Answer 1

First no. = x
Second no. = y

Equation Formation.
x = 2 y + 5
x - 2 y = 5.........equation (i)

x + y - 1 = 16
x + y = 17............. equation(ii)

Solving Equation
x + y = 17
x - 2 y = 5
     ⇅
3 y = 12
   y = 4

x = 2 y +5 
x = 2(4) + 5
 x = 13

Answer = 4 , 13