W many solutions does this linear system have? y = 2x - 5 - 8x - 4y = - 20

Question

Mathematics

Alondra Cooley

27 June, 06:15

W many solutions does this linear system have? y = 2x - 5 - 8x - 4y = - 20

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Answers (1)

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Lyric Dyer · Answer 1

Using substitution

-8x-4 (2x-5) = - 20

-8x-8x+20=-20

-16x+20=-20

-16x=-40

x=2.5

Plug x into one of the original equations.

y=2 (2.5) - 5

y=5-5

y=0

Final answer: 1 solution (2.5, 0)