NaLuShipper4Life NaLuShipper4Life

23-12-2016
Mathematics

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Solve the system using substitution.
x + y = 8
y = 3x

A. (4, 12)
B. (2, 6)
C. (1/2, 3/2)
D. (-4, -12)

Respuesta :

23-12-2016

okay sub equation 2 into equation 1:
so it becomes

x + 3x = 8
4x = 8
x = 2

then 2 + y = 8, therefore y = 6
So the answer is B

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