Because it is so popular, a store increases the cost of a toy by $$ 3.49$ .
The new cost of the toy is $$ 9.84$ .
Write an equation that represents the situation and find the solution.
Use $c$ to represent the original cost of the toy.

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Solution

Find the original cost of the toy:
The original cost of the toy is represented as $c$ .
The cost of the toy is increased by $$ 3.49$ . so the cost changes to $c + 3.49$ .
It is given, the new cost is $$ 9.84$ .
The obtained equation is $c + 3.49 = 9.84$ .
Solve the obtained equation:
$\begin{array}{rcl} c + 3.49 & = & 9.84 \\ \Rightarrow & c + 3.49 - 3.49 = 9.84 - 3.49 \\ \Rightarrow & c = 6.35 \end{array}$
Hence, the original cost of the toy is $$ 6.35$ .

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Because it is so popular, a store increases the cost of a toy by $3.49. The new cost of the toy is $9.84. Write an equation that represents the situation and find the solution. Use c to represent the original cost of the toy.

Because it is so popular, a store increases the cost of a toy by $$ 3.49$ .
The new cost of the toy is $$ 9.84$ .
Write an equation that represents the situation and find the solution.
Use $c$ to represent the original cost of the toy.