(15-n)÷(13-n)=12 find n?
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Answer:
(15-n)÷(13-n)= 12
(15-n) = 12 ( 13-n)
15-n = 156-12n
-n + 12 n = 156-15
11 n = 141
n = 141÷ 11
n = 12.82( approx)
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