The cost of a notebook is 7 rupees more than thrice the cost of a pen. Write a linear equation in two variables to represent this statement. Find out the cost of note book if the cost of a Pen is Rs5. (Take the cost of a notebook to be Rs x and that of a pen to be Rs y).
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Step-by-step explanation:
Linear equations
X=3Y+7
Cost of note book =(3×5)+7
=15+7 =Rs22
Answer:
Cost of notebook is Rs. 22
Step-by-step explanation:
Let cost of notebook = x
Let cost of pen = y
By question,
x = 3y + 7
or x = 3×5 + 7 = 15 + 7 = Rs. 22
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