Kelsey is thinking of a number. she says that the

Ответ:

ella3714

09.03.2022

The number is -36

Step-by-step explanation:

To solve this problem, we will follow the steps below;

First, we need to re-write the problem in a mathematical format.

Let x be the number

"Kelsey is thinking of a number. She says that the sum of a number and 9, multiplied by 2/3 is equal to -18" can be mathematically written as;

$\frac{2}{3} (x + 9)$ = -18

Open the bracket

$\frac{2x}{3}$ + 6 = -18

subtract 6 from both-side of the equation

$\frac{2x}{3}$ + 6 - 6 = -18-6

$\frac{2x}{3}$ = -24

Multiply both-side of the equation by 3

$\frac{2x}{3}$ × 3 = -24×3

2x = -72

Divide both-side of the equation by 2

$\frac{2x}{2}$ = $\frac{-72}{2}$

x = - 36

The number is -36

0,0(0 оценок)