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This equation shows how the amount of money Brody makes from selling lemonade is related to the number of cups sold. $\newline$ $d = 2c$ $\newline$ The variable $c$ represents the number of cups sold, and the variable $d$ represents earnings. After selling a total of $4$ cups of lemonade, how much money will Brody have made in all? $\newline$ $\$$ $\_\_\_\_$

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Evaluate two-variable equations: word problems

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Q. This equation shows how the amount of money Brody makes from selling lemonade is related to the number of cups sold.

\newline

d = 2c

\newline

The variable

c

represents the number of cups sold, and the variable

d

represents earnings. After selling a total of

4

cups of lemonade, how much money will Brody have made in all?

\newline

\$

\_\_\_\_

Identify Equation and Variables: Step $1$ : Identify the equation and variables. $\newline$ The equation given is $d = 2c$ , where $c$ is the number of cups sold and $d$ is the earnings in dollars.
Substitute Value of c: Step $2$ : Substitute the value of $c$ into the equation. $\newline$ Since Brody sold $4$ cups, substitute $c = 4$ into the equation. $\newline$ $d = 2 \times 4$
Calculate Earnings: Step $3$ : Calculate the earnings. $\newline$ $d = 8$ $\newline$ This means Brody will have made $\$8$ after selling $4$ cups of lemonade.

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