Question

A number increased by seven is 15

Answer 1

To write the expression, I'll follow these steps :

↠ First, I am going to choose a letter that will represent my number.

↠ Then I'll plug it into the expression, and write the rest.

STEP ONE

I'll choose d for my number.

STEP TWO

We now have : d increased by 7 is 15, which is the same thing as d + 7 = 15.

To find d, subtract 7 from both sides :

d = 15 - 7 = 8

Therefore, d = 8.

Answer 2

The number is 8.

To solve this equation, we can set it up as follows:

Let x be the unknown number.

• The equation "A number increased by seven is 15" can be written as:

x + 7 = 15

• Now, to find the value of x, we need to isolate it on one side of the equation. We can do this by subtracting 7 from both sides of the equation:

x + 7 - 7 = 15 - 7

• On the left side, the +7 and -7 cancel out, leaving us with just x:

x = 15 - 7

• Now, simplify the right side of the equation:

x = 8

So, the unknown number is 8.