Home › UP Board Class 10 › mathematics › linear_equations › The sum of two numbers is 25 and their differenc…
The sum of two numbers is 25 and their difference is 5. Find them.
A18 and 7
B15 and 10
C20 and 5
D12 and 13
Answer & Solution
Correct answer: B. 15 and 10
Let the numbers be x and y. x + y = 25 and x − y = 5. Add: 2x = 30 ⇒ x = 15, y = 10.
Related questions
A two-digit number has digits whose sum is 9. Reversing the digits decreases the number byFive years ago A was thrice as old as B. Ten years later A will be twice as old as B. FindSolve 1/x + 1/y = 1/3 and 1/x − 1/y = 1/12.A boat travels 30 km downstream and 18 km upstream in 4 hours. It also travels 40 km downsA father is 30 years older than his son. After 5 years the father will be three times as oA pair of equations gives a single solution iff:Solve 4x + 3y = 11 and 3x − 4y = 2.Find x and y in 5x − 7y = 2 and 7x − 5y = 22.