Реши уравнение х+70 = 100 х-10=10. 30+с=70. 40-х=30. у+8=12. у-8=15. 100-с=60. б-6=19. а+15=100. с+10=90. б-9=9. 6+а=14. с-7=13. 120-у=20. b+25=100. 16-а=4 с-3=13. 15+х=30. 60-с=50. 17-а=9. 57+b=90. а-5=54. 40+у=80. с-20=60. 24-а=12. 55+у=60. 15-х=8. у+179=179. 26-b=17. а-30=30. 9+х=16. с-8=18. 89-у=89. с+30=70. у-6=12. 140-у=50 10+a=30. 40-b=40. x+75=100. x-12=22. 63-c=0. b+7=23. 100-y=90. 97+c=98. 18+b=30. a+40=100. b-75=25. 17-a=9. c-50=50. a-8=7

1) х + 70 = 100;

х = 100 - 80;

х = 30;

2) х - 10 = 10;

х = 10 + 10;

х = 20.

3) 30 + с = 70;

с = 70 - 30;

с = 40.

4) 40 - х = 30.

х = 40 - 30;

х = 10;

5) у + 8 = 12;

у = 12 + 8;

у = 20;

6) у - 8 = 15;

у = 8 + 15;

у = 23;

7) 100 - с = 60;

с = 100 - 60;

с = 40.

8) б - 6 = 19;

б = 19 + 6;

б = 25.

9) а + 15 = 100;

а = 100 - 15;

а = 85;

10) с + 10 = 90;

с = 90 - 10;

с = 80.

11) б - 9 = 9.

б = 9 * 9;

б = 18.

12) 6 + а = 14.

а = 14 - 6;

а = 7;

13) с - 7 = 13.

с = 13 + 7;

с = 20.

14) 120 - у = 20.

у = 120 - 20;

у = 100.

15) b + 25 = 100.

b = 100 - 25;

b = 75.

16) 16 - а = 4;

a = 16 - 4;

a = 12;

17) с - 3 = 13.

c = 13 + 3;

c = 16;

18) 15 + х = 30.

x = 30 - 15;

x = 15.

19) 60 - с = 50;

c = 60 - 50;

c = 10;

20) 17 - а = 9.

a = 17 - 9;

a = 8;

21) 57 + b = 90;

b = 90 - 57;

b = 33;

22) а - 5 = 54.

a = 54 + 5;

a = 59.

23) 40 + у = 80.

y = 80 - 40;

y = 40;

24) с - 20 = 60.

c = 60 + 20;

c = 80;

25) 24 - а = 12.

a = 24 - 12;

a = 12;

26) 55 + у = 60.

y = 60 - 55;

y = 5;

27) 15 - х = 8;

х = 15 - 8;

х = 7;

28) у + 179 = 179;

y = 179 - 179;

y = 0;

29) 26 - b = 17;

b = 26 - 17;

b = 9;

30) а - 30 = 30;

a = 30 + 30;

a = 604;

31) 9 + х = 16;

x = 16 - 9;

x = 7;

32) с - 8 = 18;

c = 18 + 8;

c = 26;

33) 89 - у = 89;

y = 89 - 89;

y = 0;

34) с + 30 = 70;

c = 70 - 30;

c = 40;

35) у - 6 = 12.

y = 12 + 6;

y = 18;

36) 140 - у = 50;

y = 140 - 50;

y = 90;

37) 10 + a = 30;

a = 30 - 10;

a = 20;

38) 40 - b = 40;

b = 40 - 40;

b = 0;

39) x + 75 = 100;

x = 100 - 75;

x = 25;

40) x - 12 = 22;

x = 22 + 12;

x = 33;

41) 63 - c = 0;

c = 63 - 0;

c = 63;

42) b + 7 = 23;

b = 23 - 7;

b = 16;

43) 100 - y = 90;

y = 100 - 90;

y = 10;

44) 97 + c = 98;

c = 98 - 97;

c = 1;

45) 18 + b = 30;

b = 30 - 18;

b = 12;

46) a + 40 = 100;

a = 100 - 40;

a = 60;

47) b - 75 = 25;

b = 25 + 75;

b = 100;

48) 17 - a = 9;

a = 17 - 9;

a = 8;

49) c - 50 = 50.

c = 50 + 50;

c = 100;

50) a - 8 = 7;

a = 7 + 8;

a = 15.