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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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