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Chapter 3: Q. 17 (page 315)

In the following exercises, solve each number word

The difference of a number and 12is three. Find the number.

Short Answer

Expert verified

The number is 15.

Step by step solution

01

Step 1. Given Information  

We are given that the difference of a number and 12is three.

We have to find the number.

02

Step 2. Forming the equation  

Let the number bex,

So, the equation will be,

x-12=3

03

Step 3. Solving the equation  

Adding12on both sides, we get

x-12=3x=3+12x=15

Hence, the number is 15.

04

Step 4. Checking the solution  

Putting the value of xin the equation, we get

x-12=315-12=33=3LHS=RHS

Hence the solution is correct.

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