Math, asked by queen4444, 3 months ago

fast...step by step plss

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Answered by bangtangranger

1

Answer:

Cost of pens = ₹30, Cost of notebooks = ₹125

Step-by-step explanation:

Given,

cost of one pen = x

cost of one notebook = 15+x

3x + 5(15+x) = 155

3x + 75 + 5x = 155

75 + 8x = 155

8x = 155 - 75 = 80

x = 10

∴ Cost of 3 pens = 3 x 10 = 30 ₹

Cost of 5 notebooks = 5 x (15+10) = 125 ₹

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