Question

After a 5% pay raise , Hermione is earning $21,000 per year. What was she earning before the pay raise?

Answer 1

`\$20,000`

Explanation:

Let

x -----> Hermione was earning before the pay raise

we know that

`100\%+5\%=105\%=105/100=1.05`

so

The linear equation that represent this problem is

`1.05x=21,000`

Solve for x

Divide by 1.05 both sides

`x=21,000/1.05`

`x=\$20,000`