Tina noticed juicy oranges in a shop and asked the shopkeeper for the price. He said each costs Rs. x. She bought 3 of them.
What is the coefficient of x after calculating the total amount spent by Rina and Tina, if Rina had already spent Rs. 6x + 4y?
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Solution

The price for 3 oranges is Rs. 3x.
Rina had spent Rs. 6x + 4y.
So, the total amount spent is Rs. 6x + 4y + 3x = Rs. 9x + 4y.
Here, the coefficient of x is 9.

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Tina noticed juicy oranges in a shop and asked the shopkeeper for the price. He said each costs Rs. x. She bought 3 of them. What is the coefficient of x after calculating the total amount spent by Rina and Tina, if Rina had already spent Rs. 6x + 4y? ___

The price for 3 oranges is Rs. 3x. Rina had spent Rs. 6x + 4y. So, the total amount spent is Rs. 6x + 4y + 3x = Rs. 9x + 4y. Here, the coefficient of x is 9.

Tina noticed juicy oranges in a shop and asked the shopkeeper for the price. He said each costs Rs. x. She bought 3 of them.
What is the coefficient of x after calculating the total amount spent by Rina and Tina, if Rina had already spent Rs. 6x + 4y?
___

The price for 3 oranges is Rs. 3x.
Rina had spent Rs. 6x + 4y.
So, the total amount spent is Rs. 6x + 4y + 3x = Rs. 9x + 4y.
Here, the coefficient of x is 9.