Question

Which of the following equations could be the result of using the comparison method to solve the system shown? x + y = 5 2x + y = 7

Answer 1

Answer: the correct answer is

5 - x = 7 - 2x

Explanation:

Answer 2

so (x,y) = (2,3)

Explanation:

we have

x +y= 5 ------ equation 1

2x+y= 7-------equation 2

Multiplying equation--1 by 2, we will have equation---3

2x +2y= 10-----equation 3

now subtracting equation 2 from equation 3

2x + 2y= 10

2x + y = 7

y = 3

adding value of y in equation 1

x + y = 5

x= 5 -y

x= 5 - 3

x =2

so (x,y) = (2,3)