Question

Use the substitution method to solve the system of equations. Enter your answer as an ordered pair
14x - 2y = 78

2x - 2y = 6

Answer 1

2x-2y=6
divide this with 2
x-y=3
x=3+y..(1)

sub to 14x - 2y = 78
14(3+y)-2y=78
42+14y-2y=78
12y=36
y=3

sub to x=3+y..(1)
x=3+3=6

(3,6)