Question

Умоля решите я дала 40 баллов

Answer 1

а) - 4/7*2.1х = - 4.2

2.1х = - 4.2/ - 4/7

2.1х = 7.35

х= 7.35 /2.1

х= 3.5 Ответ: 3.5

б) -1.1(х+ 2 2/3) = 8 4/8

-1.1(х+ 2 2/3) = 68/8

-1.1(х+ 8/3) = 8.5

-1.1х- 8.8/3 = 8.5

-1.1х= 8.5 + 8.8/3

-3.3х= 2.25 +8.8

-3.3х = 34.3

х= - 34.3/3.3

х= - 343/33 Ответ: - 343/33

2)

а) ((-5)*(-4)*(-2)*(-1)*0*1*2*3)/0,123 = 0

11/-(-9) + 2 1/3 - (- 1/6) * 12,5 + 1 13/30

11/9 + 2 1/3 + 1/6 * 12,5 + 1 13/30

11/9 + 7/3 + 1/6 * 12,5 + 43/30

11/34/3 + 25/12 + 43/30

33/34 +25/12 + 43/30

4577/1020 Ответ: 4577/1020