−7x−6y=4 x=−3y+8 solve for x and y me asap

-7x - 6y = 4      and      x = -3y + 8

so:

    -7(-3y+8) - 6y = 4

    21y - 56 - 6y = 4

        15y = 4 + 56

        15y = 60

          y = 4    

x = -3y + 8

x = -3•4 + 8

x = -12 + 8

x = -4

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads