3 years ago

Solve each system of equations 2x- 5y = 7 3x - y = -9

Mathematics

1 answer:

Darina [25.2K]3 years ago

8 0

Answer:

x = -4; y = -3

Step-by-step explanation:

2x - 5y = 7

3x - y = -9

Rewrite top equation. Multiply both sides of bottom equation by -5. Add equations. This eliminates y, and we solve for x.

2x - 5y = 7

(+) -15x + 5y = 45

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

-13x = 52

Divide both sides by -13.

x = -4

Substitute -4 for x in the first original equation and solve for y.

2x - 5y = 7

2(-4) - 5y = 7

-8 - 5y = 7

-5y = 15

y = -3

Answer: x = -4; y = -3

-5 =

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