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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)
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2 votes
Solve the system using substitution.

x + y = 8
y = 3x

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

User Anomitra
by
7.9k points

1 Answer

2 votes
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
User Tometheus
by
7.7k points
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