Ответы
Пошаговое объяснение:
№1
2/17(0,51 - 3,4х) - 2/9(0,45 - 2,7х) = 1
2/17(51/100 - 34/10х) - 2/9(45/100 - 27/10х) = 1
2/17(51/100 - 17/5х) - 2/9(9/20 - 27/10х) = 1
102/1700 - 34/85х - 18/180 + 54/90х = 1
3/50 - 2/5х - 1/10 + 3/5х = 1
3/50 - 2/5х - 5/50 + 3/5х = 1
-2/50 + 1/5х = 1
1/5х = 1 + 2/50
1/5х = 1 + 1/25
1/5х = 1. 1/25
1/5х = 26/25
х = 26/25 : 1/5
х = 26/25 * 5/1
х = 26/5 * 1/1
х = 26/5
х = 5. 1/5 или 5,2
№2
35,1(9/13х - 4/9) - 22,4(5/16х - 3/7) = 28,6
351/10(9/13х - 4/9) - 224/10(5/16х - 3/7) = 28. 6/10
3159/130х - 1404/90 - 1120/160х + 672/70 = 28. 3/5
243/10х - 78/5 - 7х + 48/5 = 28. 3/5
24. 3/10х - 15. 3/5 - 7х + 9. 3/5= 28. 3/5
17. 3/10х - 6 = 28. 3/5
17. 3/10х = 28. 3/5 + 6
17. 3/10х = 34. 3/5
173/10х = 173/5
х = 173/5 : 173/10
х = 173/5 * 10/173
х = 1/1 * 2/1
х = 2/1
х = 2
1)(2/17)(0.51 - 3.4х) - 2/9(0.45 - 2.7х) = 1
2*0.51/17-34*2х/17-2*0.45/9+2*2.7х/9=1
0.06-0.4х-0.1+0.6х=1
0.2х=1.04
х=1.04/0.2
х=5.2
2) 35.1(9/13х - 4/9) - 22.4(5/16х - 3/7) = 28.6
35.1*9х/13-35.1*4/9-22.4*5х/16+3*22.4/7=28.6
24.3х-15.6-7х+9.6=28.6
17.3х=34.6
х=2