Respuesta :

baseballboss14
The work is in the attachment. The answer though is [m=12.5] Hope this helped ☻
first set up problem: 0.4m = 5
next divide : 0.4m = 5
                      ________ cancel out both 0.4
                      0.4       0.4 
then: 5 divided by 0.4 = 12.5
last: m=12.5