What must be added to 2x - 3y to get x 0 2y - WAEC Mathematics 2011 Question
What must be added to (2x - 3y) to get (x 0 2y)?
A
5y - x
B
y - x
C
x - 5x
D
x - y
correct option: b
What must be added to 2x - 3y = Difference between x - 2y and 2x - 3y
x - 2y - 2y - (2x - 3y); x - 2y - 2x + 3y
= x - 2x + 3y - 2y
= y - x
x - 2y - 2y - (2x - 3y); x - 2y - 2x + 3y
= x - 2x + 3y - 2y
= y - x
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