Question

3) -2x – 3y = -7

-4x + y = 21
A) (-8, 4)
C) (2, 4)
B) (-4,5)
D) No solution

Answer 1

B). (-4, 5)

Explanation:

-2x – 3y = -7 | ×2 |

-4x + y = 21 | ×1 |

-4x – 6y = -14

-4x + y = 21

____________ --

-7y = -35

y = -35/-7

y = 5

-4x + y = 21

-4x + 5 = 21

-4x = 21 - 5

-4x = 16

x = 16/-4

x = -4