Question

In the equation minus m over 20 +4=7 what is first step to solve

Answer 1

Simple....

we have:

$\frac{-m}{20}$+4=7

We must first isolate what we want to find...or m......

So...we must..

$\frac{-m}{20} +4=7$
                              -4  -4

Leaving you with...

$\frac{-m}{20} =3$

Thus, your answer isolate the variable. (Subtract 4 from both sides.)