Х:1,7=0,873-0,053
х:1,7=0,82
х=0,82*1,7
х=1,394
1133.
1) 2 2/3 : 2 + (4/15 + 2/5) : (3 1/3 * 3/5) = 1 2/3
1) 4/15 + 2/5 = 4/15 + 6/15 = 10/15 = 2/3
2) 3 1/3 * 3/5 = 10/3 * 3/5 = 2
3) 2 2/3 : 2 = 8/3 : 2/1 = 8/3 * 1/2 = 8/6 = 4/3
4) 2/3 : 2 = 2/3 * 1/2 = 1/3
5) 4/3 + 1/3 = 5/3 = 1 2/3
2) 2 : 1/4 + ((1 1/2 + 2 2/3) : 3 3/4 - 2/3) : 8 8/9 = 8,05
1) 1 1/2 + 2 2/3 = 1 3/6 + 2 4/6 = 3 7/6 = 4 1/6
2) 4 1/6 : 3 3/4 = 25/6 : 15/4 = 25/6 * 4/15 = 5/3 * 2/3 = 10/9 = 1 1/9
3) 1 1/9 - 2/3 = 1 1/9 - 6/9 = 10/9 - 6/9 = 4/9
4) 4/9 : 8 8/9 = 4/9 : 80/9 = 4/9 * 9/80 = 4/80 = 1/20
5) 2 : 1/4 = 2 * 4 = 8
6) 8 + 1/20 = 160/20 + 1/20 = 161/20 = 8 1/20 = 8,05
1134.
3) 16х² 5²у
------ × ------ = 10х
5у 2³х
( Х + 4) * X = 165 X^2 + 4X - 165 = 0D = 16 + 660 = 676 ; √ D = 26X1 = ( - 4 + 26 ) : 2 = 11 X2 = ( - 30 ) : 2 = - 15 11 + 4 = 15 - 15 + 4 = - 11 Ответ числа 15 и 11 ( или - 15 и - 11 )