2x5+24=n+23 Nx6-15=27 64:n-7=9 25+5-n=20 1/2n=50

1. 10+24 = n+23
34 = n + 23
n = 11
2. n*6-15 = 27
6n = 42
n = 7
3. 64:n-7 = 9
64:n = 16
n = 4
4. 25+5-n= 20
30-n = 20
n = 10
5. 1/2 n = 50
n = 100