(6 1/8-1,75): (9-2,2* [5 6/11-3,5])* 1 2/7= 1 17/28. __________________________________________ По действиям; 1)) (6 1/8-1,75)= (6*8+1)/8- 1 3/4= 49/8- (4*1+3)/4= 49/8- 7/4= (49-7*2)/8=(49-14)/8=35/8; ______________________________________ 2)) [5 6/11- 3,5]= (5*11+6)/11- 3 1/2= 61/11- (2*3+1)/2= 61/11- 7/2= (61*2-7*11)/(11*2)= (122-77)/22= 45/22= 2 1/22; ______________________________________ 3)) 2,2* 2 1/22= 2 1/5* 45/22= 11/5* 45/22= 1/1* 9/2= 9/2= 4 1/2;
_______________________________________ 4)) 9- 4 1/2= 9/1- 9/2= 18/2-9/2= 9/2= 4 1/2;
_______________________________________ 5)) 35/8: 4 1/2= 35/8: 9/2= 35/8* 2/9= 35/4* 1/9=35/36; ______________________________________________ 6)) 35/36* 1 2/7= 35/36* 9/2= 17/4* 1/1= 17/4= 4 1/4.
203 * 124 – (100000 – 31627) / 213 = 24851
100000 - 31627 = 68373
68373 / 213=321
203*124=25172
25172-321=24851
Ответ:
S=1
Пошаговое объяснение дано в приложении
(120 643-х)+9061=70643
120643-х=70643-9061
120 643-х= 61 582
х= 120 643- 61 582
х=59 061
2-2(x-1)=4(x-2)
2-2x+2=4x-8
2+2+8=2x+4x
12=6x
x=12:6
x=2