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Question

We have two equations,
15(x2)=14(1y)

and

26x+3y+4=0

If we solve it using cross-multiplication, we use the following arrangement, after converting equations to the standard form.



What are the values of A and B?


A

A = 5, B = 3

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B

A = 3, B = 4

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C

A = 4, B = 26

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D

A = 13, B = 26

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Solution

The correct option is A

A = 5, B = 3


15(x2)=14(1y)

4(x2)=5(1y)

4x85+5y=0

4x+5y13=0(1)

26x+3y+4=0(2)

Using cross multiplication method


Hence A = 5 and B = 3.

x20+39=y(13)(26)16=112130

x=59118=12

y=354118=3


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