Question

use the elimination method to solve the system of equations 5u+3v=-18
2u+v=-6

Answer 1

5u+3v=-18
2u+v=-6

Solve for one of the variables...I'll go with v
v = -6-2u

Now plug v back into the first equation:
5u+3(-6-2u)=-18
5u-18-6u=-18
5u-6u=0
-u = 0

Now plug u back into the second equation:
2(0)+v=-6
v = -6

Answer 2

does anyone know how to factor
x (x+3)-9(x+3)