1)56284:523=108
2)1536300:270=5690
3)7125*248=1767000
4)1767000:62=28500
5)28500+0=28500
6)5690*108=614520
7)614520-28500=586020
Ответ:586020.вроде так
11s+(11f-6s)=11s+11f-6s=11(s+f)-6s=s(11+6)+11f
<span>7 7/30 - (5 11/30 - Y ) =3 19/30</span>
<span>7 7/30- 3 19/30=5 11/30 - Y</span>
<span>5 11/30 - Y= 3 18/30</span>
Y=5 11/30-3 18/30
Y=1 23/30
<span> (X - 1 9/17) + 2 14/17=5 5 /17</span>
<span>X - 1 9/17=5 5 /17- 2 14/17</span>
<span>X - 1 9/17=2 8/17</span>
<span>X=2 8/17+1 9/17</span>
<span>X=3 17/17</span>
<span>X=4</span>
3*(2+0)-2(х-5)=3*2-2*(0-5)=6-2*(-5)=6-(-10)=-4