Решите уравнение; 1) (41α-39α) ·47=3384; 2) (500b-497b) : 85=99; 3) 1050: (17x+8x) = 21; 4) 2244: (111z-9z) = 22:

1) (41a-39a) * 47=3384

2a*47=3384

2a=3384:47

2a=72

a=72:2

a=36

2) (500b-497b) : 85=99

3b:85=99

3b=99*85

3b=8415

b=8415:3

b=2805

3) 1050: (17x+8x) = 21

1050:25x=21

42x=21

x=0,5

4) 2244: (111z-9z) = 22

2244:102z=22

22z=22

z=1