passpadi

2011

Mathematics

JAMB

Solve for x and y respectively in the simultaneous equations -2x - 5y = 3. x + 3y = 0

A.

-3, -9

B.

9, -3

C.

-9,3

D.

3, -9

Correct Answer: -9,3

Explanation

-2x -5y = 3 x + 3y = 0 x = -3y -2 (-3y) - 5y = -3 6y - 5y = 3 y = 3 but, x = -3y x = -3(3) x = -9 therefore, x = -9, y = 3

-2x -5y = 3 x + 3y = 0 x = -3y -2 (-3y) - 5y = -3 6y - 5y = 3 y = 3 but, x = -3y x = -3(3) x = -9 therefore, x = -9, y = 3
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