Question

the sum of two numbers is 90 and the greater number exceeds twice the smaller by 15. Find the smaller number

Answer 1

Let the 2 no's be x and y Give that: x+y=90 .........eq1 And x-2y=15 ..............eq2 Eq1-Eq2 gives us: (x+y)-(x-2y) = 90-15 x +y-x+2y = 75 3y= 75 y= 25 And we know x+y=90 Hence y=90-25 =65. The smallest no.is 25