Question

Which of the following equations is equivalent to the given equation?

Answer 1

5(7a + 5) - 80 = 4(3a + 15)

Explanation:

Answer 2

`\begin{equation*} 5(7a+5)-80=4(3a+15) \end{equation*}`

Explanation:

Given the equation:

`(7a+5)/(8)-2=(3a+15)/(10)`

First, find the lowest common multiple of the denominators 8 and 10.

• The LCM of 8 and 10 = 40

Then, multiply all through by 40:

`\begin{gathered} (40(7a+5))/(8)-2(40)=(40(3a+15))/(10) \\ \implies5(7a+5)-80=4(3a+15) \end{gathered}`

The third option is equivalent.