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The price of 3 pencil and 4 pen is 24rs for 6 pencil and 3 pen is 27 Rs what is the price of each |
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Answer» Answer: Let price of one pencil and one pen be be 'a' and 'b' respectively. Step-by-step explanation: Solution: 3a+4b=24 ...........(i) 6a+3b=27 ...........(ii) Solving this by ELIMINATION METHOD , Multiplying 2 in equation (i), 2(3a+4b)=24 =6a+8b=48 ........(iii) 6a+3b=27 .........(ii) Subtract equation (ii) from(iii) 6a+8b=48 _ 6a+3b=27 The sign in 'a' changes and 'a' is cancelled,the sign in b changes,sign of +27 changes to -27. +8b - 3b=+5b 48 - 27=21 5b=21 b=+4.2 Putting value of b in equation(i), we GET value of 'a' as ,a=+2.4 Therefore value of one pencil is 2.4rs and value of one pen is 4.2rs. |
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