M-4+N+23=M+N+19
..................................
Sinx=-1/2;
x=(-1)^n+1*arcsin1/2+пn;
x=(-1)^n+1*п/6+пn.
<span>S (АFB) = S (АВС) / 2 = 96 / 2 = 48 </span>
<span>S (DFB) = S (ADF) = S (AFB) / 2 = 48 / 2 = 24 </span>
<span>S (DEF) = S(DBF) / 2 = 24 / 2 = 12 </span>
<span>S (AEF) = S (ADF) + S (DEF) = 24 + 12 = 36</span>
1) х-4х+11+9-2х=-5х+20
2) 10-9а+6+5а-16=-4а