If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a= -3, 3, 1/5

Step-by-step explanation:

we have

we know that

If a ordered pair lie on the graph of the equation

then

the ordered pair must be satisfy the equation

so

Substitute the value of point in the equation and solve for a

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

215.92 dollars is the answer