please help with this
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Hey nice question..
Make two equations with the given info..
3x+4y =31
And 4x+3y=32
Then multiply eq 1 by 3 and eq2 by 4
We get..
9x+12y=93and 16x+12y=128
Now subtract both eqs..
We will get x=5 and on further solving y=4
Now,5 maths books will cost 5x ie ₹25..and 4 physics books will cost 4y ie 16₹
(In this q i ve taken maths books to be x and physics book to be y)
Hope this helps u...
Make two equations with the given info..
3x+4y =31
And 4x+3y=32
Then multiply eq 1 by 3 and eq2 by 4
We get..
9x+12y=93and 16x+12y=128
Now subtract both eqs..
We will get x=5 and on further solving y=4
Now,5 maths books will cost 5x ie ₹25..and 4 physics books will cost 4y ie 16₹
(In this q i ve taken maths books to be x and physics book to be y)
Hope this helps u...
suzi82:
Total cost ll be 16 +25: ₹41
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