Chapter 4.4, Problem 47HP

To determine

To find: whether S is correct or R in solving equation

Answer to Problem 47HP

Rachel is correctly solving the equation.

Explanation of Solution

Given:

S and R are solving $\frac{x}{4}=-20.$

Calculation:

R is right because the following steps she has done is right

  $\frac{x}{4}=-20$

Multiply both sides with 4

  $\frac{x}{4}\cdot 4=-20\cdot 4$

  $x=-80$

Here to remove 4 in denominator, the numerator is multiplied with 4

Conclusion:

Therefore, R is right