<h3>∠ACB + ∠DCB = 180° - по свойству смежных углов</h3><h3>∠АСВ = 180° - ∠DCB = 180° - 120° = 60°</h3><h3><u><em>ОТВЕТ: 60°</em></u></h3><h3><u><em /></u></h3>
Log₄2+log1/4 8=log₄2+log₄-¹8=log₄2-log₄8=log₄2/8=log₄1/4=-1
<span>5(y-2)-4(y-1)=16
y=22</span>