Respuesta :

Answer:

m=-4

Step-by-step explanation:

5m-10m=-10m+5m=-(10m-5m)=-5m=20

divide by 5 on both sides, -m=4

miltiply by -1 on both sides, m=-4

Answer:

m = - 4

Step-by-step explanation:

Given

5m - 10m = 20 ← simplify left side by combining terms

- 5m = 20 ( divide both sides by - 5 )

m = - 4