Объяснение:
4,625×2 2/15 ÷2,96-2 4/7=37/8 ×32/15 ÷74/25 -2 4/7=37×4/15 ×25/74 -2 4/7=4/3 ×5/2 -2 4/7=20/6 -2 4/7=3 7/21 -2 12/21=2 28/21 -2 12/21=16/21
30,25÷4 5/7 ÷1,05-2 1/6=121/4 ×7/33 ×20/21 -2 1/6=11×5/(3×3) -2 1/6=55/9 -2 1/6=5 20/18 -2 3/18=3 17/18
1) <span>7/9-47/72 = 56/72 - 47/72 = 8/72 = 1/8
2) 1/8 : 1,25 = 1/10
3) 1/10 + 7/40 = 4/40 + 7/40 = 11/40
4) </span><span>0,358-0,108 = 0,25 = 1/4
5) 11/40 : 1/4 = 44/40 = 11/10
6) 11/10 * 1,6 = 176/100
7) 176/100 - 19/25 = 176/100 - 19*4/100 = (176 - 76)/100 = 100/100 = 1.
Ответ: 1.</span>
У= -3х-7;
х=-4;
у=-3 * (-4)-7;
у=12-7;
у=5.
ответ:5