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


-x- 5 = 7 - 2x
5 -x= 7 - 2x
5 -x= 2x- 7
@johnweldon1993

Answer 1

so you'll want to solve for 1 variable in each equation here

solve each equation for y

Answer 2

y = -x + 5

y = -2x + 7

now COMPARE them...(set them equal to each other)

what would that look like?

Answer 3

-x+5=-2x+7

Answer 4

which choice does that look like??

Answer 5

5 -x= 2x- 7 is what i meant

Answer 6

same thing just rearranged :)

so which choice?

Answer 7

that is the choie lol

Answer 8

lol oh...i was waiting for like....choice 3...or something lol...regardless....yes correct :)

Answer 9

Solve the following system of equations by the substitution method.

x - y = 0

x - y - 2 = 0

What is the solution set?


{(1, -1)}
{(-1, 1)}
Ø