Question

. Use a system of linear equations with two variables and two equations to solve the following problem: Find two numbers whose sum is 27 and difference is 13.

Answer 1

soit x et y les nombres

x+y =27

x-y=13

⇒2x=40

⇒x=20

x-y=13

20-y=13

-y=13-20

y=7

numbers are 20;7

Explanation: