JakyaI334238 JakyaI334238

25-10-2022
Mathematics

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solve the system of equations by substitution. Check your answer

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HelamanL300727 HelamanL300727

25-10-2022

Using Substitution method:

2 x - y = 23 --------------- equation 1

x- 9 = -1 ----- equ 2

x = -1 + 9

x = 8 .......(1)

put x = 8 in equ 1

2 (8) - y = 23

16 - y = 23

16 - 23 = y

y = -7.....(11)

Conclusion : x = 8, y = -7

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