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(50 Points)
Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9?
x + 2y = 21

Respuesta :

alainagkoffi
x + 2y = 21
3 + 2(9) = 21
3 + 18 = 21
So I think the equation is 3 + 2(9) = 21

Answer:

It's option C.

Step-by-step explanation:

It's right on edmentum. Also just use substitution. Not that hard.

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