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Question

In each of the following, find the co-ordinates of the point whose abscissa is the solution of the first equation and ordinate is the solution of the second equation:
5x(5x)=12(3x);43y=4+y3.

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Solution

First equation:
5x(5x)= 12(3x)
5x5+x= 12(3x)

6x5= 12(3x)

12x10=3x

13x=13

x=1

Second equation:

43y=4+y3
129y=4+y
y=45
Hence, required point =(x,y)=(1,45)


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