Solve the system of equations by substitution - 5x+8y= -86 y=6x-43

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asked Oct 17, 2022 158k views

13 votes

Solve the system of equations by substitution - 5x+8y= -86
y=6x-43

Mathematics
college

Per Mildner asked

by Per Mildner

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1 Answer

9 votes

Answer:

(6 ,-7)

Explanation:

$- 5x + 8y = - 86 \\ y = 6x - 43 \\ - 5x = - 86 - 8y \\ x = 17.2 + 1.6y \\ y = 6(17.2 + 1.6y) - 43 \\ y = 103.2 + 9.6y - 43 \\ 8.6y = - 60.2 \\ y = - 7 \\$

$x = 17.2 + 1.6( - 7) \\ x = 17.2 - 11.2 \\ x = 6$

Flex Monkey answered Oct 21, 2022

by Flex Monkey

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