It's A because if you replace x with 2 and y with 22 both of the equations will work
y = 7x + 8
y = x + 20
7x + 8 = x + 20 transitive of equality
6x + 8 = 20 subtract x from both sides
6x = 12 subtract 8 from both sides
x = 2 divide both sides by 6
Hope This Helps! Have A Nice Night!!
