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The equation 10x +5y= 80 where x is the number of sandwiches models the problem in the Solve lt . How many sandwiches can you buy if you buy 3 pizzas? 6 pizzas?

User ArcticZero
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1 Answer

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Given:


10x+5y=80

Here x represents the number of pizzas and y represents the number of sandwiches.

Buy 3 pizas:

Substitute x=3 in the given expression, and solve for y.


\begin{gathered} 10x+5y=80 \\ 10*3+5y=80 \\ 5y=80-10*3 \\ y=(80-30)/(5) \\ y=(50)/(5) \\ y=10 \end{gathered}

Thus, you can buy 10 sandwiches if you buy 3 pizza.

Assume you buy 6 pizzas.

Substitute x=6 in the given expression.


\begin{gathered} 10x+5y=80 \\ 10*6+5y=80 \\ 5y=80-10*6 \\ y=(80-60)/(5) \\ y=(20)/(5) \\ y=4 \end{gathered}

Thus, you can buy 4 sandwiches if you buy 6 pizzas.

User Qwertylpc
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