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jcorley0534
jcorley0534 jcorley0534
  • 07-02-2017
  • Mathematics
Answered



What is the solution to this system of equations?

x − 2y = 15

2x + 4y = -18



A.x = 1, y = -6




B.x = 1, y = -7




C.x = 3, y = -6




D.x = 3, y = -7

Verified Answer :

wolf1728
wolf1728 wolf1728
  • 07-02-2017

A)   x − 2y = 15

B2x + 4y = -18
Multiplying A) by 2
A) 2x -4y = 30
B) 2x + 4y = -18

4x = 12
x = 3
Inputting into equation A)
A) 6 -4y = 30
-4y = 24
y = -6
answer is "C"
Answer Link

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