Marcab wrote:

Hii Shan.

Replying to your PM, I guess you are also making the same silly and also much disastrous mistake.

Expand carefully and notice the difference between the equations.

Moreover, If you are applying the same method of mine then after getting the final values, put them in the respective equations. The equation won't satisfy.

Yes Marcab i got solution that VIPS and others stated...

sorry for the offense VIPS

but i'm eager enough to know about my mistake... (or even the way marcab did)

I donno where i did mistake in substitution method

But i'm getting solution in solving two equation

.....

No offence taken bro! Definitely I screwed enough to raise such doubts on my tips and solutions

To know where you/marcab went wrong, you need to focus on basic concept of solving linear equations. You MUST be able to eliminate one of the variables. some do it with substitution and some using addition/substraction- whichever is easier in the given context.

For this question: if you are getting a soltion- that is correct. Ans must be C not E for the set of equations.