1.-15=-4m + 5
So it will be
-4m=5+15
Because here, if a negative is crossing an equal sign, it becomes positive.
So is going to be
-4m=20
Here, 4 has a variable so it will divide it self and 20.
So -4m divided by -4 = m,
M, because negative divide negative and 4 divide 4.
And 4 divided by 20 is 5.
So the answer to this is 5