Question

What is the solution of the system of equations X plus 3Y equals seven, 3X plus 2Y equals 083, to be -2, 3C2, negative3D -3, 28 -2 -3

Answer 1

Answer:

B

Step-by-step explanation:

x + 3y = 7 → (1)

3x + 2y = 0 → (2)

Multiplying (1) by - 3 and adding to (2) will eliminate x

- 3x - 9y = - 21 → (3)

Add (2) and (3) term by term to eliminate x

0 - 7y = - 21

- 7y = - 21 ( divide both sides by - 7 )

y = 3

Substitute y = 3 into either of the 2 equations and solve for x

Substituting into (1)

x + 3(3) = 7

x + 9 = 7 ( subtract 9 from both sides )

x = - 2

solution is (- 2, 3 ) → B