Question

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

Answer 1

(x,y) =(a,7)
x= a
y= 7

5x-y=8
By substituting the value of y
5x-7 =8
5x=15
x= 3


As x = a=3
So, a =3

Answer 2

5x - y = 8

5x - 7 = 8
5x = 8+7
5x = 15
x = 3

a=x=3

Answer: a=3