Question

x – y = 7
x + y = 5

What is the x-value of their intersection?

6

-1

12

none of the above

Answer 1

6

Answer 2

x – y = 7
x + y = 5 add the two equations

2x=12
x=6

Answer 3

thanks i thought it was 12

Answer 4

then whats the solution

Answer 5

x – y = 7
x – y = 5

What is the solution?

(6, -1)

no solution

infinite solutions

none of the above

Answer 6

if you subtract the equations here you will get
0=2 impossible

so no solution

Answer 7

i dont get this one is it (4,2),
x + 2y = 4
2x + 4y = 8

What is the solution?

(4,2)

no solution

infinite solutions

none of the above