Answer:
A, C, E
Explanation:
0.6 + 15b + 4 = 25.6
Let's solve the original equation for b.
15b + 4.6 = 25.6
15b = 21
b = 21/15 = 7/5
A.
15b + 4 = 25
15b = 21
b = 21/15 = 7/5
Equivalent
B.
15b + 4 = 25.6
0.6 was subtracted from the left side but not from the right side of the original equation.
Not equivalent
C.
3(0.6 + 15b + 4) = 76.8
Since 76.8 = 3 * 25.6, this equation was obtained by multiplying both sides of the original equation by 3.
Equivalent
D.
15b = 25.6
4.6 was subtracted from the left side of the original equation, but not from the right side.
Not equivalent
E.
15b = 21
b = 21/15 = 7/5
Equivalent
Answer: A, C, E