the cost of 2 pencils and 3 erasers is Rs. 9 and the cost of 4 pencils and 6 erasers is Especially. 18. Find the cost of each pencil and each eraser.
by elimination method
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Answer:
Hi!
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The Pair of Linear Equation formed were
2x + 3y = 9 ---> 1
4x + 6y = 18 ----> 2
Express the Value of x in terms of y from eq (1)
2x + 3y = 9
x = \frac{9 - 3y }{2}x=
2
9−3y
Now Substitute the value of x in eq (2)
4x + 6y = 18
\frac{4(9 - 3y}{2} + 6y = 18
2
4(9−3y
+6y=18
18 - 6y + 6y = 18
18 = 18
Hence , there are many Common Solutions to the given Situation
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