Question

`-2m-5m=9m-12`

Answer 1

`\boxed{ \bold{ \huge{ \boxed{ \sf{m = 0.75}}}}}`

Explanation:

`\sf{ - 2m - 5m = 9m - 12}`

Collect like terms

⇒
`\sf{ - 7m = 9m - 12}`

Move 9m to left hand side and change it's sign

⇒
`\sf{ - 7m - 9m = - 12}`

Collect like terms

⇒
`\sf{ - 16m = - 12}`

Divide both sides of the equation by -16

⇒
`\sf{ ( - 16m)/( - 16) = ( - 12)/( - 16) }`

Calculate

⇒
`\sf{ m = 0.75}`

Hope I helped!

Best regards!!

Answer 2

`- 2m - 5m = 9m - 12 \\ ⟶ - 2m - 5m - 9m = - 12 \\ ⟶ - 16m = - 12 \\ ⟶ - m = ( - 12)/(16) \\ ⟶ - m = ( - 6)/(8) \\ ⟶ m = - ( - (6)/(8) ) \\ ⟶m = (6)/(8)`

`m=0.75`