Aaron, Blaine, and Cruz are solving the equation

4
7
(7 − n) = −1.

Aaron started his solution by multiplying both sides

of the equation by
7
4
.

Blaine started by using the distributive property to

multiply
4
7
by both 7 and −n.

Cruz started by dividing both sides of the equation

by
4
7
.

Which of the following is true?

Blaine and Cruz made an error in picking their first steps.
Cruz made an error in picking his first step.
All three made an error because the right side equals -1.
All three chose a valid first step toward solving the equation.