Solve for 5y + 3x = 23 and y = - 2x - 8

y = - 2x - 8

5y + 3x = 23

5(- 2x - 8) + 3x = 23

5(- 2x) (5)( - 8) + 3x = 23

-10x-40+3x=23

-7x-40=23

-7x-40+40=23+40

-7x=63

-7x/-7=63/-7

x=-9

y = - 2x - 8

y = - 2(-9)- 8

y=18-8

y=10