Represent the following situations mathematically:(i)    John and Jivanti together have 45 marbles. Both of them lost 5 marbles each, and the product of the number of marbles they now have is 124. We would like to find out how many marbles they had to start with.(ii)   A cottage industry produces a certain number of toys in a day. The cost of production of each toy (in rupees) was found to be 55 minus the number of toys produced in a day. On a particular day, the total cost of production was Rs 750. We would like to find out the number of toys produced on that day.

Explanation

### Step-by-Step Solution

**(i)** Let the number of marbles John has be \( x \). Since John and Jivanti together have 45 marbles, the number of marbles Jivanti has can be expressed as \( 45 - x \).

1. **Initial Setup**:
- John has \( x \) marbles.
- Jivanti has \( 45 - x \) marbles.

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