the total cost of 6 books and 7 pens is 79 rupees and the cost of 7 books and 5 pens is 77 rupeess .find the cost of 1 book and 2 pens.
shashank68:
plzzz help
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i just answered that
6b+7p=79................(1)
7b+5p=77................(2)
(1)-(2)...... b=2p-2
substituting in 1
19p=91
p=4.79
b=7.58
b+2p=17.16
6b+7p=79................(1)
7b+5p=77................(2)
(1)-(2)...... b=2p-2
substituting in 1
19p=91
p=4.79
b=7.58
b+2p=17.16
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