Question

Which equations are equivalent to the given equation?

0.4y = 10
Choose all answers that are correct.
A. 0.4y = 10/0.4
B. 0.4y / 0.4 = 10 / 0.4
C. 0.4y * 2.5 = 10 * 2.5
D. 0.4y / 0.4 = 10 0.4

Answer 1

A. 0.4y = 10/0.4
no, this is clearly the same as above PLUS the /0.4 part

B. 0.4y / 0.4 = 10 / 0.4

yes!
we can divide both sides by the same number

C. 0.4y * 2.5 = 10 * 2.5


yes!
we can multiply both sides by the same number

D. 0.4y / 0.4 = 10 0.4

is there a missing sing here? only if there is a "/" between 10 and 0.4 are those equivalent.