Which ordered pair (c, d) is the solution to the given system of linear equations?
2 answers:
Answer:
a
Step-by-step explanation:
i got it right on edge
Answer:
(-1,6)
Step-by-step explanation:
The missing part of this question is the system given as;
![-c+2d=13](https://tex.z-dn.net/?f=-c%2B2d%3D13)
![-9c-4d=-15](https://tex.z-dn.net/?f=-9c-4d%3D-15)
We solve for c in the top equation to get:
![c=2d-13](https://tex.z-dn.net/?f=c%3D2d-13)
Substitute
into the bottom equation to get:
![-9(2d-13)-4d=-15](https://tex.z-dn.net/?f=-9%282d-13%29-4d%3D-15)
Expand to get:
![-18d+117-4d=-15](https://tex.z-dn.net/?f=-18d%2B117-4d%3D-15)
Group similar terms to get:
![-18d-4d=-15-117](https://tex.z-dn.net/?f=-18d-4d%3D-15-117)
![-22d=-132](https://tex.z-dn.net/?f=-22d%3D-132)
![d=6](https://tex.z-dn.net/?f=d%3D6)
Put
into
to get:
![c=2*6-13](https://tex.z-dn.net/?f=c%3D2%2A6-13)
![c=12-13=-1](https://tex.z-dn.net/?f=c%3D12-13%3D-1)
The solution is (-1,6)
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Step-by-step explanation:
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