Simultaneous equations - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 1982

Seven years ago, the age of a father was three times that of his son, but in six years time the age of the son will be half that of his father, representing the present ages of the father and son by x and y, respectively, the two equations relating x and y are

A. 3y - x = 0; 2y - x = 0
B. 3y - x = 14; x - 2y = 6
C. 3y - x =7; x - 2y = 6
D. 3y - x = 14; y - 2x = 6
E. X + 3y = 7; x = 2y = 12

Question 17:

• JAMB 1982

The solution to the simultaneous equations 3x + 5y = 4, 4x + 3y = 5 is

A. (\(\frac{-13}{11}, \frac{1}{11}\))
B. (\(\frac{13}{11}, \frac{1}{11}\))
C. (\(\frac{13}{11}, \frac{-1}{11}\))
D. (\(\frac{11}{13}, \frac{1}{11}\))
E. (13, 11)

Question 18:

• JAMB 1983

Solve the following equations 4x - 3 = 3x + y = x - y = 3, 3x + y = 2y + 5x - 12

A. X = 5, y = 2
B. X = 2, y = 5
C. X = 5, y = -2
D. X = -2, y = -5
E. X = -5, y = -2

Question 19:

• JAMB 1983

Solve the simultaneous equations for x in x² + y - 8 = 0, y + 5x - 2 = 0

A. -28, 7
B. 6, -28
C. 6, -1
D. -1, 7
E. 3, 2

Question 20:

• JAMB 1984

If 2x + 3y = 1 and x - 2y = 11, find (x + y)

A. 5
B. -3
C. 8
D. 2
E. -2