Monday 15 January 2018

WORD PROBLEMS 2


The difference between two numbers is 10 and their sum is 680. Find the two numbers.

Solution

Let the two numbers be x and y.

x – y = 10 ----------- (i)
x +y = 680. ------------(ii)

===========================


From (i)
 x – y = 10
x = 10+ y -------------- (iii)

===========================

Substitute (iii) in (ii) above.

x +y = 680. ------------(ii)

(10+ y) +y = 680

10 + 2y = 680

2y = 680 - 10

2y = 670

12y = 670335
12      21

y = 335

from (iii)

x = 7+ y

x = 7+ 335

x = 342

Hence the two numbers are 335 and 342.

TRY THIS…………………………



The difference between two numbers is 10 and their sum is 226. Find the two numbers.

No comments:

Post a Comment