Answer
We would have to earn $\$10,000$
Work Step by Step
Let $M$ be the amount of money we earn in order to buy the car. 28% of $M$ is used for taxes, so the remaining 72% of $M$ can be used to pay for the car.
We can express 72% as a decimal.
72% = 0.72
We can find $M$.
$0.72~M = \$7200$
$M = \frac{\$7200}{0.72}$
$M = \$10,000$
We would have to earn $\$10,000$
