Question

Camille is sixty-six inches tall. This is twenty inches less than two times Mindy's height. How tall is Mindy ?

Answer 1

Mindy is 46 inches

Explanation:

Let m = Mindy's height

66 = 2m - 20 Add 20 to both sides

66 + 20 = 2m - 20 + 20

86 = 2m Divide both sides by 2

`(86)/(2)` =
`(2m)/(2)`

46 = m

Answer 2

Let's call Mindy's height "M". According to the problem, we know that:

Camille's height = 66 inches

Camille's height = 2 * Mindy's height - 20 inches

We can substitute the first equation into the second equation to solve for Mindy's height:

66 inches = 2 * M - 20 inches

We can add 20 inches to both sides of the equation to get:

66 inches + 20 inches = 2 * M

This gives us:

86 inches = 2 * M

To find Mindy's height, we can divide both sides of the equation by 2:

M = 86 inches / 2

So Mindy is 43 inches tall.