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olga55 [171]
3 years ago
15

Hello! I need help PLZ!! If anyone knows I would appreciate it! Thank you so much! :)

Mathematics
1 answer:
rjkz [21]3 years ago
6 0

Answer:

its either b or d

Step-by-step explanation:

b or d is the answer

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If 5b=6a+16 and 9a=7b-20, then what are the values of a and b? show work.
Strike441 [17]

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Rewrite 5b=6a+16 and 9a=7b-20 vertically:

5b=6a+16

9a=7b-20

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       6a + 16

b = --------------

             5

Substitute this result into the second equation:

9a = 7(b) + 16, or

             6a + 16

9a = 7*-------------- - 20

                   5

Eliminate the fraction by multiplying all three terms by 5:

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3 years ago
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