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]

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