170k views
22 votes
7. y= 6x - 11
-2x -3y=
-7

User Traxxus
by
4.0k points

1 Answer

9 votes

Answer:

(2, 1 )

Explanation:

y = 6x - 11 → (1)

- 2x - 3y = - 7 → (2)

substitute y = 6x - 11 into (2)

- 2x - 3(6x - 11) = - 7 ← distribute parenthesis and simplify left side

- 2x - 18x + 33 = - 7

- 20x + 33 = - 7 ( subtract 33 from both sides )

- 20x = - 40 ( divide both sides by - 20 )

x = 2

substitute x = 2 into (1)

y = 6(2) - 11 = 12 - 11 = 1

solution is (2, 1 )

User Ebandersen
by
3.5k points