Question

X - y = -2 7x + 2y = -5 Élimination method

Answer 1

Answer:

x = -1, y = 1

Step-by-step explanation:

Multiply the top equation by 2:

$2x - 2y = - 4$

Leaving the bottom equation unchanged, add the two resulting equations to eliminate y, obtaining:

$9x = - 9$

Solve this for x, and then substitute this value of x into the bottom equation. Finally, solve for y.

$x = - 1$

$7( - 1) + 2y = - 5$

$- 7 + 2y = - 5$

$2y = 2$

$y = 1$