Find numbers C and D that solve the system of linear equations: 2 C + 5 D = −9 and −2 C + 3 D = −15

Answer 1

2C + 5D = -9

-2C + 3D = -15

By adding the equations together we get 8D=-24

So D= -3

Plug in -3 for D in any of the equations and you can solve for C.

C=3

Answer 2

2C + 5D = -9

-2C + 3D = -15

8D = -24