Question

нужна помощь даю 70 балов

Answer 1

Пошаговое объяснение:

№1

1.

1) -3 1/3 : (-1 1/4) = -10/3 : (-5/4) = -10/3 * (-4/5) =

-2/3 * (-4/1) = 8/3

2) 8/3 : 8/25 = 8/3 * 25/8 = 25/3 = 8 1/3

2.

1) 1 3/4 - 3 1/6 = 1 9/12 - 3 2/12 = 1 9/12 - 2 14/12 = -1 5/12

2) 1 8/9 : (-1 5/12) = 17/9 : (-17/12) = 17/9 * (-12/17) = -12/9 = -4/3

3) -4/3 * (-9/16) = -1/1 * (-3/4) = 3/4

№2

-14х + 8х = -7,29

-6х = -7,29

х = -7,29 : (-6)

х = 1,215

7х - 9х = 0,39

-2х = 0,39

х = 0,39 : (-2)

х = -0,195

1,9х - 0,2х - 2,4х = -1,12

-0,7х = -1,12

х = -1,12 : (-0,7)

х = 1,6