Jambmaths question:
The binary operation * is defined $x*y=xy-y-x$ for real values of x and y. If $x*3=2*x$, find the value of x
Option A:
–1
Option B:
–2
Option C:
1
Option D:
5
Jamb Maths Solution:
$\begin{align} & x*3=2*x \\ & 3x-3-x=2x-x-2 \\ & 2x-3=x-2 \\ & x=1 \\\end{align}$
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