Question 260241
The inequality we need is the following:
{{{70 < (1/3)m + (2/3)f < 79}}}
since m = 48, we then get
{{{70 < (1/3)*48 + (2/3)f < 79}}}
which is
{{{70 < 16 + (2/3)f < 79}}}
subtract 16 from all parts to get
{{{54 < (2/3)f < 63}}}
multiply all parts by 3/2 to get
{{{81 < f < 94.5}}}