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Find the solution to the following system by substitution. x+y=18 y = 3x + 6 A. (6,24) B. (15,3) C. (4,18) D. (3, 15)
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Find the solution to the following system by substitution.

x+y=18
y = 3x + 6
A. (6,24)
B. (15,3)
C. (4,18)
D. (3, 15)

User Omaraf
by
4.1k points

1 Answer

3 votes

Answer:

D. (3, 15)

Explanation:


x + y = 18


x + (3x + 6) = 18


x + 3x + 6 = 18


4x = 18 - 6


4x = 12


(4x)/(4) = (12)/(4)


x = 3

Solve for y:


y = 3x + 6


y = 3(3) + 6


y = 9 + 6


y = 15

User Slobodan Kovacevic
by
3.7k points
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