Solve the system by either substitution or elimination

Question

3x-5y=21
2x+y=1

A (2,-3)
B (2,3)
C (-2,-1)
D (-2,1)

Answer 1

multiply the 2nd equation by 5 and you have

3x-5y = 21
10x+5y = 5

Now you can eliminate y and get x, then figure y.

Answer 2

a (2, -3)

Answer 3

thanks you for helpful explanation