Question

Three times a number increases by 15 is equal to 30

Answer 1

Using the equation 3x+15=30 x being the number we are trying to find out we replace x with 5 as 3*5 is 15+15 = 30

Answer 2

Answer: The number is 5.

Explanation:

First, let d be our number.

Since we know that d is our number, we rewrite the expression this way:

3 times d incresed by 15 is 30.

3 times d is 3d; 3d increased by 15 => 3d + 15. This equals 30:

3d + 15 = 30

To solve for d, subtract 15 from both sides:

3d = 15

Next, divide both sides by 3:

d = 5