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svet-max [94.6K]
3 years ago
14

Solve to find the values of a and b.4a + 7b = 389a + 7b = 68​

Mathematics
1 answer:
Nataliya [291]3 years ago
5 0
4a + 7b = 38 -> (1)
9a + 7b = 68 -> (2)

Subtract (1) from (2),
9a - 4a + 7b - 7b = 68 - 38
5a = 30
a = 6
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4 0
4 years ago
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7 0
4 years ago
Steve studies math for 7/8 of an hour and history for 2/3 of an hour. How many hours did he study?
hoa [83]

Answer:

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Step-by-step explanation:

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If you want explanation please ask me .
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hope this helps
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