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19-11-2020
Mathematics

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Plzzzz help!!!
What is the solution to this system of equations?
3x + y = 17
x + 2y = 49

A. It has no solution.

B. It has infinite solutions.

C. It has a single solution: x = 15, y = 17.

D. It has a single solution: x = -3, y = 26.

Respuesta :

19-11-2020

The answer is D,
Multiply the first equation by 2 and you get 6x+2y=34, you can then subtract the second equation from this and you gey 5x=-15, so x is -3, you can substitute this value of x into any of the 2 equations and find the value of y

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