4 - m equals 6m - 8?

Answer 1

4 - m = 6m - 8
add m to both sides
4-m+m = 6m+m - 8
4 = 7m+8
subtract 8 from both sides
4-8 = 7m+8-8
-4 = 7m
divide both sides by 7
-4/7 = m

M = -4/7