Question

Which point is a solution of the system of linear equations? x − 2y = −1 y = −2x + 3 (1, 1) (1, −1) (−1, 1) (−1, −1)

Answer 1

A (1,1)

Explanation:

I did it on the test and got it right :)

Answer 2

• A) (1, 1)

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Given system:

• x - 2y = - 1,
• y = - 2x + 3.

Solve by substitution:

• x - 2(- 2x + 3) = - 1
• x + 4x - 6 = - 1
• 5x = 6 - 1
• 5x = 5
• x = 1

Find y:

• y = - 2*1 + 3 = - 2 + 3 = 1

The matching choice is A.