21-3 (a-7) = a + 20, find a.. 6.5. 4.5. 7.5. 5.5

1.	21-3 (a-7) = a + 20, find a.. 6.5. 4.5. 7.5. 5.5
Answer» Answer: In this UNIT we consider how number patterns ARISE, how to FIND particular ... and finding the formula for a general term in a sequence. ... (F) 10, 9.5, 9, 8.5, 8, 7.5, . ... 2.5, 3.5, 4.5, 5.5, 6.5, .

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In this UNIT we consider how number patterns ARISE, how to FIND particular ... and finding the formula for a general term in a sequence. ... (F) 10, 9.5, 9, 8.5, 8, 7.5, . ... 2.5, 3.5, 4.5, 5.5, 6.5, .

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21-3 (a-7) = a + 20, find a.. 6.5. 4.5. 7.5. 5.5​

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21-3 (a-7) = a + 20, find a.. 6.5. 4.5. 7.5. 5.5