ANSWER :
IV. Solve each proportion
1) n = 20
2) n = 1
3) n = 3
4) n = 3
5) n = 16
SOLUTION :
1) 3/4 = 15/n
3 × n = 3n
4 × 15 = 60
60 ÷ 3n = 20
2) n/3 = 8/24
n × 24 = 24n
3 × 8 = 24
24 ÷ 24n = 1
3) 2/n = 10/15
2 × 15 = 30
n × 10 = 10n
30 ÷ 10n = 3
4) 6/10 = n/5
6 × 5 = 30
10 × n = 10n
30 ÷ 10n = 3
5) n/4 = 24/6
n × 6 = 6n
4 × 24 = 96
96 ÷ 6n = 16
