Solve the system of equations. y = 9x y = 2x + 63

y=2x+7

y=9x+8

From (1),

x = (y-7) / 2

Substituting value of x in eqn (2) we get,

y = 9. (y-7) / 2 + 8

Y=9x and

y=2x+63

subsitute 9x for y

9x=2x+63

minus 2x from both sides

9x-2x=2x-2x+63

7x+0=63

7x=63

divide both sides by 7

7x/7=63/7

(7/7) x=9

(1) x=9

x=9

sub back to find y

y=9x

y=9 (9)

y=81

(x, y)

(9,81)

the solution is (9,81)