Use elimination to solve this system of equations. 2x-4y=5 and - x+2y = 8

Question

Alicia Lindsey

Mathematics

29 October, 22:18

Use elimination to solve this system of equations. 2x-4y=5 and - x+2y = 8

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Answers (1)

Know the Answer?

Haley Chambers · Answer 1

A)

-x + 2y = 8

2y = 8 + x

y = 4 + 1/2x

B)

2x - 4y = 5

2x - 4 (4+1/2) = 5

2x - 16 - 2 = 5

2x - 18 = 5

2x = 23

x = 23/2 or 11.5

To find y

y = 4 + 1/2x (equation found in the A)

y = 4 + 1/2x

y = 4 + 1/2 (23/2)

y = 4 + 12

y = 16