check the picture below.
since we know the angles at A and B, than the angle at F is just 180 - A - B.
[tex]\bf \cfrac{sin(F)}{f}=\cfrac{sin(B)}{b}\implies \cfrac{sin(85^o)}{7}=\cfrac{sin(60^o)}{b}\implies b=\cfrac{7\cdot sin(60^o)}{sin(85^o)}\\\\
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\cfrac{sin(F)}{f}=\cfrac{sin(A)}{a}\implies \cfrac{sin(85^o)}{7}=\cfrac{sin(35^o)}{a}\implies a=\cfrac{7\cdot sin(35^o)}{sin(85^o)}[/tex]
make sure your calculator is in Degree mode.
