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Which ordered pair is the solution to the system of equations? 2x−y=−5 x+3y=22 A.(1, 7) B.(4, 9) C.(7, 19) D.(8, 21)
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5 votes
Which ordered pair is the solution to the system of equations?

2x−y=−5
x+3y=22

A.(1, 7)
B.(4, 9)
C.(7, 19)
D.(8, 21)

User Serjlee
by
7.2k points

1 Answer

2 votes
Multiply top equation by 3

---> 6x -3y = -15
---> x + 3y = 22

Add equations together, this way the y terms will cancel themselves out.

---> 7x = 7

Solve for x

x = 7/7 = 1

Therefore the answer must be A) (1,7)
User Sahdeep Singh
by
7.6k points
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