WebbAnswer (1 of 10): Let the cost of 1- pen= a The cost of 1- pencil=b The cost of 1- eraser= c So =>4a+ 2b+ 8c= 12 ……Eqn---1 ===> 8a+ 10b+ 4c = 36 …Eqn---2 ... Webb25 mars 2024 · 8 pens. Let's model our situation with an equation. We're going to have two variables, one for pencils and one for pens. Let p stand for the number of pencils bought, n stand for the number of pens bought, and C be the total cost (in dollars): C=0.27p+0.32n, as we're given the individual costs of pencils and pens. We are given our cost, C=$4.18. …
Plenty of Pens - Maths
Webb28 mars 2024 · Let the cost of a notebook be Rs x and the cost of pen be Rs y It is given that Cost of notebook = 2 Cost of pen x = 2y x 2y = 0 x 2y = 0 is the linear equation in two variables Show More. Next: Ex 4.1, 2 (i) → Ask a doubt . Chapter 4 Class 9 Linear Equations in Two Variables; Serial order ... WebbA man purchased 50 pencils for Rs 3 each and sold them at Rs 4 each. What is his total gain, and what is his gain percent? Your total gain depends on your total caloric intake, your activity level, and your metabolism. Assuming you don't want to eat pencils, take your extra Rs50, and buy a banana or two. papale antonio
RD Sharma Solutions for Class 8 Chapter 13 Profit, Loss ... - BYJUS
WebbSolution. Verified by Toppr. Given total cost of 5 pens and 10 pencil = Rs 30. 5 pens + 10 pencils = 30. pens + 2 pencils = 1. also given pen cost 3 more than a pencil. i.e, pen = 3 + … Webb27 maj 2024 · A shopkeeper buys 50 pencils for 80 rupees and sells them at 40 pencils for 90find his gain or loss percent Advertisement Expert-Verified Answer 68 people found it helpful omabinash cost price of 50 pencils = ₹80 selling price of 40 pencils =₹90 Then, selling price of one pencil = 90/40 =₹2.25 selling price of 50 pencils =2.25×50= ₹112.50 Webb30 dec. 2024 · x is the number of packets of pens bought and y is the number of packets of pencils bought. So, for (1) we have that 4x + 3y = 24. We cannot write it as 7x = 24 unless … おう ぎ 形 面積 計算