The equation 4x – 45 = y is used to find your profit, y, in dollars from buying $45 of supplies and washing cars for $4 each. what does the x stand for?
1. the cost of the supplies (in dollars)
2. the total profit (in dollars)
3. the number of cars washed
4. the cost (in dollars) per car

The number is -2

Step-by-step explanation:

step 1

Find the reciprocal of 2/3

Remember that when multiply a number by its reciprocal, the result is 1

so

The reciprocal of 2/3 is 3/2

step 2

Let

x-----> the number added to the numerator and denominator

Solve for x

step 3

verify

substitute x=-2

Simplify

----> is ok

therefore

The number is -2