55.7k views
4 votes
X + y = 7
2x - y = -1

User Robertk
by
7.1k points

1 Answer

6 votes

Answer:

x = 2; y = 5

Explanation:

Method to solve: Elimination:

Solving for x:

The two equations in the system are arranged in such a way that allows us to solve for x and eliminate the ys (y - y = 0):

x + y = 7

+

2x - y = -1

----------------------------------------------------------------------------------------------------------

(x + 2x) + (y - y) = (7 - 1)

(3x = 6) / 3

x = 2

Thus, x = 2.

Solving for y:

Now we can solve for y by plugging in 2 for x in the first equation (x + y = 7):

(2 + y = 7) - 2

y = 5

Thus, y = 5.

User Mariolu
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.