The cost of coloured paper is r 7 more than `1//3` of the cost of white paper wirte this statement in linear equation in two variables

Answer

To convert the statement "The cost of coloured paper is Rs 7 more than `1/3` of the cost of white paper" into a linear equation in two variables, we can follow these steps:

### Step-by-Step Solution:

1. **Define the Variables**:
- Let the cost of coloured paper be \( x \).
- Let the cost of white paper be \( y \).

2. **Translate the Statement into an Equation**:
- The phrase "Rs 7 more than `1/3` of the cost of white paper" can be expressed mathematically.
- One-third of the cost of white paper can be written as \( \frac{y}{3} \).
- Therefore, Rs 7 more than this amount can be expressed as \( \frac{y}{3} + 7 \).

3. **Set Up the Equation**:
- According to the problem, the cost of coloured paper \( x \) is equal to Rs 7 more than one-third of the cost of white paper.
- This gives us the equation:
\[ x = \frac{y}{3} + 7 \]

4. **Rearranging the Equation**:
- To express this in a standard linear form, we can eliminate the fraction by multiplying the entire equation by 3:
\[ 3x = y + 21 \]

5. **Final Form of the Linear Equation**:
- Rearranging gives us:
\[ 3x - y = 21 \]

### Final Answer:
The linear equation in two variables based on the given statement is:
\[ 3x - y = 21 \]