Question

I need help I kind of remember doing it but I haven't done it in a while.

Answer 1

We have a DM line that has a value of 25 in turn, this DM line can be formed by the DG+GM lines

DG measures r+3 and GM measures 4r-28 and we already know that DM=DG+GM

Let's replace the values, operate, and clear r

`\begin{gathered} DM=DG+GM \\ 25=(r+3)+(4r-28) \\ 25=5r-25 \\ 25+25=5r \\ (50)/(5)=r \\ r=10 \end{gathered}`

The answer is r=10