Question
If the cost of 4 pens and 6 notebooks is ₹ 600, then
find the cost of 6 pens and 9 notebooks.Solution
4pen +6notebook =600 2(2pen+3notebook) =600 (2pen+3notebook) =300 … (1) Then Equation (1) multiply by 3. 6pen+9notebook=900. =900Rs
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