Aruna has only 1rupee 2rupee with her if the total no. Of coins she has is 15 and the amount of money has is 75find the no. of coins 1rupee 2ruppe
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By taking rupee 1 as x, rupee 2 as y
We get, x+y =15
Therefore x=15-y........ (1)
Also, x×1+y ×2 =75
x+2y =75
On substituting eq 1 and 2
We get x+2y =75 ,
15-y +2y =75,
15-y=75,
Y=15-75,
Y=-60,
x=15-y
x=15-(-60)
x=15+60
X=75
We get, x+y =15
Therefore x=15-y........ (1)
Also, x×1+y ×2 =75
x+2y =75
On substituting eq 1 and 2
We get x+2y =75 ,
15-y +2y =75,
15-y=75,
Y=15-75,
Y=-60,
x=15-y
x=15-(-60)
x=15+60
X=75
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