prealgebra
posted by marybeth .
Please check
42=4n+17n
N=3.09
13+10c4=29
C=3.8

prealgebra 
Ms. Sue
42=4n+17n
42 = 21n
2 = n
13+10c4=29
9 + 10c = 29
10c = 20
c = ?
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