Question

пжжжжжжжжжжжжжжж даю 50 балов​

Answer 1

Ответ:

Пошаговое объяснение:

1) a * (52 + 73) = 8*52 + 8*73

125a = 8 * (52 + 73)

125a = 8 * 125 | :125

a = 8

2) 3*a + 7*a = 9 * 21

(3+7)*a = 189

10*a = 189

a = 18.9

3) 23*a + 41*a = (23+41)*19

(23 + 41) * a = 64 * 19

64*a = 64*19

a = 19

4) 48*a - 33*a = (48-33) * 28

(48 - 33) * a = 15*28

15*a = 15*28

a = 28