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Len [333]
3 years ago
7

How do I solve the symptoms of linear equations by substitution 2x-y=23x-9=-1​

Mathematics
2 answers:
JulsSmile [24]3 years ago
7 0

Answer:

x = 8, y = -7

in coordinate form: (8,-7)

Step-by-step explanation:

first, find x using the second equation:

x - 9 = -1

add 9 to both sides of the equation

x - 9 + 9 = - 1 + 9

x = -1 + 9

x = 8

next, substitute x for 8 in the first equation:

2x - y = 23

2 * 8 - y = 23

16 - y = 23

16 - y + y = 23 + y

16 = 23 + y

16 - 23 = y

y = -7

also, I had this exact question on an assignment earlier today ahah

Ivan3 years ago
6 0
Yes!! the person above got the correct answer!! hope you have an awesome day!!
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3 years ago
The first two terms in a geometric series are 20, 22. To two decimal places, the sum of the first k terms of the series is 271.5
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Answer:

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