Question

Solve the system of equations by the substitution method
{x=4/9y-1
{18x-7y=-15

Answer 1

(x, y) (1/3, 3)

Explanation:

substitute x with 4/9y-1

we will get

18(4/9y-1) -7y = -15

solving for y we get

y = 3

substitute y with 3 for the first eqaution

x=4/9(3)-1= 1/3

we will get x = 1/3