Question

The sum of 3 times a number and 12 is 20

Answer 1

Answer:

$3x + 12 = 20$

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

Step-by-step explanation:

Let x represent the unknown number.

3 times the unknown number is 3*x. = 3x

The sum of 3x and 12 is said to be 20.

This can be represented by the following equation:

$3x + 12 = 20$ (sum means addition)

The equation of the statement given in the equation can be expressed as $3x + 12 = 20$.

We can equally find the value of the unknown number using the equation, thus:

$3x + 12 = 20$

Subtract 12 from each side of the equation

$3x + 12 - 12 = 20 - 12$

$3x = 8$

Divide both sides by 3

$\frac{3x}{3} = \frac{8}{3}$

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