Ответ:
Пошаговое объяснение:
1) -0,5x = -10;
x=-10:(-0.5);
x=20.
2) 6.2-x = -3.8;
-x=-3.8-6.2;
-x=-10;
x=10.
3) (5x-2)*3 = -18;
5x-2 = -18:3;
5x-2 = -6;
5x=-6+2;
5x=-4;
x=-4:5;
x= -0.8.
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По действиям:
1) 1 1/9*1 1/5 = 10/9 * 6/5 = (10*6)/(9*5) = 4/3 = 1 1/3;
2) 1 1/3+1 = 2 1/3;
3) 2 1/3 - 1/9 = 2 3/9 - 1/9 = 2 2/9;
4) 8 5/9*3/14 = (77/9)*(3/14) = (77*3)/(9*14) = 11/6 = 1 5/6;
5) 1 5/6 - 7/18 = 1 15/18 - 7/18 = 1 8/18 = 1 4/9;
6) 2 2/9 : 1 4/9 = 20/9 : 13/9 = (20/9) * (9/13) =20/13=1 7/13.
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Answers & Comments
Ответ:
Пошаговое объяснение:
1) -0,5x = -10;
x=-10:(-0.5);
x=20.
2) 6.2-x = -3.8;
-x=-3.8-6.2;
-x=-10;
x=10.
3) (5x-2)*3 = -18;
5x-2 = -18:3;
5x-2 = -6;
5x=-6+2;
5x=-4;
x=-4:5;
x= -0.8.
*************
По действиям:
1) 1 1/9*1 1/5 = 10/9 * 6/5 = (10*6)/(9*5) = 4/3 = 1 1/3;
2) 1 1/3+1 = 2 1/3;
3) 2 1/3 - 1/9 = 2 3/9 - 1/9 = 2 2/9;
4) 8 5/9*3/14 = (77/9)*(3/14) = (77*3)/(9*14) = 11/6 = 1 5/6;
5) 1 5/6 - 7/18 = 1 15/18 - 7/18 = 1 8/18 = 1 4/9;
6) 2 2/9 : 1 4/9 = 20/9 : 13/9 = (20/9) * (9/13) =20/13=1 7/13.