числитель: 9целых 1/2 - 11 = 9 + 1/2 - 11 = -2 + 1/2 = -4/2 + 1/2 = (-4+1)/2 = -3/2
<span>( 2\3х - 4\5) * 15=8</span>
<span>10х-12=8</span>
<span>10х=20</span>
<span>х=2</span>