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7. Which method would be the most efficient to solve the system? y = 1/2x, 2x + 3y = 28 A) graphing B) substitution C) elimination D) distributive
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7. Which method would be the most efficient to solve the system? y = 1/2x, 2x + 3y = 28

A) graphing
B) substitution
C) elimination
D) distributive

User Velocity
by
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1 Answer

2 votes
y = ¹/₂x
2x + 3y = 28

2x + 3y = 28
2x + 3(¹/₂x) = 28
2x + 1¹/₂x = 28
3¹/₂x = 28
3¹/₂ 3¹/₂
x = 8
y = ¹/₂x
y = ¹/₂(8)
y = 4
(x, y) = (8, 4)
The method would be a substitution method (the answer is B).
User Amereservant
by
7.7k points
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