Ответ:

Пошаговое объяснение:

a = 6; b = 2; c = 5; d = 7

1) 717b - 84b + 88c = 633b + 88c = 633*2 + 88*5 = 1266 + 440 = 1706

2) 564b + (a-b)*26 = 564b+26a-26b = 538b+26a = 538*2 + 26*6 = 1076+156 = 1232

3) (d+c)*25 + 34d = 25d+25c+34d = 59d+25c = 59*7 + 25*5 = 413+125 = 538

4) (d+c)*34 - 42d = 34d + 34c - 42d = 34c - 8d = 34*5 - 8*7 = 170 - 56 = 114