please help me with this

Answer:
[tex]m=\frac{4}{5}[/tex]
Explanation:
[tex]4(1+0.5m)=7m\\[/tex]
[tex]4+2m=7m[/tex]
[tex]2m-7m=-4[/tex]
[tex]-5m=-4[/tex]
Divide both sides of the equation by the coefficient of the variable:
[tex]m=\frac{-4}{-5}[/tex]
Determine the sign for multiplication or division:
[tex]m=\frac{4}{5}[/tex]