Question

5z-3+8z+7=?+4. the question mark indicates a missing term.

Answer 1

`?=13z`

Step-by-step explanation

We want to find the missing term on the right-hand side of the equation:

`5z-3+8z+7=\text{?}+4`

To do this, we simply have to simplify the left-hand side of the equation and compare it to the right-hand side.

That is:

`\begin{gathered} 5z-3+8z+7 \\ 5z+8z-3+7 \\ 13z+4 \end{gathered}`

Comparing this to the right-hand side, we see that:

`?=13z`