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Chapter 3: Q. 15 (page 315)

In the following exercises, solve each number word

The sum of a number and eight is 12. Find the number.

Short Answer

Expert verified

The number is 4.

Step by step solution

01

Step 1. Given Information 

We are given that the sum of a number and eight is 12.

We have to find the number.

02

Step 2. Forming the equation 

Let the number be x,

So, the equation will be,

x+8=12

03

Step 3. Solving the equation 

Subtracting8 from both sides, we get

x+8=12x=12-8x=4

Hence, the number is 4.

04

Step 4. Checking the solution 

Putting the value ofxin the equation, we get

x+8=124+8=1212=12LHS=RHS

Hence the solution is correct.

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