4a + 7b = 38 -> (1)
9a + 7b = 68 -> (2)
Subtract (1) from (2),
9a - 4a + 7b - 7b = 68 - 38
5a = 30
a = 6
Answer:
48 : 60 56 : 70 64 : 80
Step-by-step explanation:
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Answer:
marci got 49/50
Step-by-step explanation:
Answer:
Check the explanation
Step-by-step explanation:
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