Answer :
We have
[tex]\mleft(4m-12-3m\mright)7<140[/tex]we need to simplify the inequality
[tex](m-12)7<140[/tex][tex]7m-84<140[/tex][tex]7m<140+84[/tex][tex]7m<224[/tex]then we isolate m
[tex]m<\frac{224}{7}[/tex][tex]m<32[/tex]We have
[tex]\mleft(4m-12-3m\mright)7<140[/tex]we need to simplify the inequality
[tex](m-12)7<140[/tex][tex]7m-84<140[/tex][tex]7m<140+84[/tex][tex]7m<224[/tex]then we isolate m
[tex]m<\frac{224}{7}[/tex][tex]m<32[/tex]