X * y is 4x + 5Y divided into axy, and 1 * 2 = 1, find the value of 2 * 3 There must be an operation process, and every step must have one

X*Y=4X+AXY/5Y=4X+AX/5
1*2=4+A/5=1
A=-15
be
X*Y=4X-15X/5=4X-3X=X
therefore
2*3=2
3*4=3
4*5=4
……

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