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M(3-4m)=7+4(8-m2) m=?
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M(3-4m)=7+4(8-m2) m=?

User Anbu Raj
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m(3-4m)=7+4(8-m^2) \\ 3m-4m^2=7+32-4m^2 \\ 3m-4m^2+4m^2=7+32 \\ 3m=39 \\ m=(39)/(3) \\ m=13
User Silow
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