JAMB - Mathematics (2011 - No. 13)
Solve for x and y respectively in the simultaneous equations -2x - 5y = 3. x + 3y = 0
-3, -9
9, -3
-9,3
3, -9
Penjelasan
-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
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