Plz help will mark brainlest 1 hour timer and must be rigth and to or more must naswer plz help

Equation: -6=-6-m-7m

Solution: m= 0

Equation: -1=-5x+3+3x

Solution: x=2

Equation: 2+5x-1=21

Solution: x= 4

Hope this helps! :)

#1.  m=0

#2.  x=2

#3.  x=4

Step-by-step explanation:

the solution is h=10 because you add 9 to each side of the equation.