10/7 - 1 3/7
22/9 - 2 4/9
17/3 - 5 2/3
33/5 - <span>6 3/5</span>
(7+12)*6=19
19*6=144
Ответ:P=144
275
625
1375
1925
1650
185625
3(x-4)=5x
3x-12=5x
5x-3x=-12
2x=-12
x=-6
-5(7-x)=6
-35+5x=6
5x=6+35
5x=41
x=8,2
<span>2(0,2x-3)-8(0,7x-4)=39
0,4x-6-5,6x+32=39
5,6x-0,4x=32-39-6
5,2x=26-39
5,2x=-13
x=-67,6
</span>
<span>0,5(3x-4)+4,4=0,9(4x-2)
1,5x-2+4,4=3,6x-1,8
3,6x-1,5x=4,4+1,8-2
2,1x=4,2
x=2</span>
<span>5 2/7+2 1/3=5 6/21+2 7/21=7 13/21 ;
3+5 1/6=8 1/6 ;
2 7/12+1 3/4=2 7/12+1 9/12=3 16/12=4 4/12=4 1/3 ;
2 5/36+7 1/9=2 5/36+7 4/36=9 9/36=9 1/4 ;
3 1/6+10 7/12=3 2/12+10 7/12=13 9/12=13 3/4 ;
1 5/14+6 1/7=1 5/14+6 2/14=7 7/14=7 1/2</span>