Răspuns:
a) <AOB=136* iar <BOC=44*
b) <AOB=68* iar <BOC=112*
Explicație pas cu pas:
<AOB+<BOC=180*
a) 2x+20*+x-14*=180* => 3x+6*=180*
3x=180*-6*
3x=174*
X=174*/3* => x=58*
<AOB=2•58*+20*=116*+20*
<AOB=136*
<BOC=58-14 => <BOC=44*
b) 3x-28*+X+80*=180*
4x+52*=180*
4x=180*-52*
4x=128* =>x=128*/4 => x=32*
<AOB=3•32*-28*=96*-28* => < AOB=68*
<BOC=32*+80* => <BOC=112*
O zi senina!
