8x+9y=-28 -4x=y solve the system by subsitution

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York Shen asked Jun 27, 2023

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3 votes

8x+9y=-28
-4x=y
solve the system by subsitution

Mathematics
high-school

York Shen asked Jun 27, 2023

by York Shen

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2 Answers

12 votes

Answer:

Explanation:

8 + 9 = 17

17y = 28

28 / 17 = 1.64

Happydave answered Jun 29, 2023

by Happydave

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30 votes

Answer:

x= 1

y = -4

Explanation:

8x + 9y = -28

-4x = y

8x + 9(-4x) = -28

8x - 36x = -28

-28x = - 28

x = 1

y = -4(1) = -4

B Pete answered Jul 4, 2023

by B Pete

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