Two pens and three pencils together cost of Rs 20. represented this statement as a linear equation in two variable and give two solutions for it. also verify if (4,2)is a solution of the equation formed.
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cost of each pen =Rs x
cost of each pencil =Rs y
2x+3y=20--'(1)
substitute (x,y)=(4,2) in (1)
2×4+2×2=20
12=20 (false)
(4,2) is not a solution
cost of each pencil =Rs y
2x+3y=20--'(1)
substitute (x,y)=(4,2) in (1)
2×4+2×2=20
12=20 (false)
(4,2) is not a solution
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