Solve for 2x = 5y + 45 and x = - y - 9

x = - y - 9

2x = 5y + 45

2(- y - 9) = 5y + 45

2(- y) (2)( - 9) = 5y + 45

-2y-18= 5y + 45

-2y-18+18= 5y + 45+18

-2y= 5y +63

-2y-5y= 5y +63-5y

-7y=63

-7y/-7=63/-7

y=-9

x = - y - 9

x = - (-9) - 9

x=0