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Taya2010 [7]
3 years ago
6

3) Solve the system using substitution. Show all work. -4x + 3y = 23 y = -7x - 9

Mathematics
1 answer:
Rina8888 [55]3 years ago
5 0

Answer:

x = -2

Step-by-step explanation:

-4x + 3y = 23

y = -7x - 9  //  *-3

-4x + 3y = 23

-3y = 21x -27

+++++++++++++++++++

-4x = 21x + 50

-50 = 25x

x = -2

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I need the answer to this
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Answer:

8 Hours

Step-by-step explanation:

Since 4 painters painting one house takes 14 hours, then one person would take 56 hours to paint the whole house. Hence, 4 x 14 = 56. If 7 people painted the house, then 8 hours would be needed since 56 / 7 = 8.

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