11. There are 100 doctors in a hospital. Forty-five of them are from Luzon, 25 doctors are from Visayas, Write the equation to find the number of doctors from Mindanao?
A. 100+45+25=x
B. 100-45-25 =x
C. 45+25+x+100
D. 45-25-x+100
12. Solve for the value of x in the equation 6x-3=21
A. 3
B. 4
C. 5
D. 6
13. Solve the equation : b-10 =22
A. 2
B. 12
C. 22
D. 32
14. If thrice a number is fifteen, what is the number?
A. 3
B. 4
C. 5
D. 6
15. I am 5 years older than twice the age of my younger brother. If I were 47 years old, how old is my younger brother?
