Final answer:
To find r in the equation in 49 = 7r, divide both sides by 7, which simplifies to r = in 7.
Step-by-step explanation:
The student is asking to solve the equation in 49 = 7r to find what r stands for.
To solve for r, we need to isolate it on one side of the equation.
Therefore, we divide both sides of the equation by 7, which gives us r = in 49 / 7.
This simplifies to r = in 7 because in 49 is equivalent to in (7×7), which is equal to 2×in 7. Hence, r is simply in 7.