Question

решите уравнения:
643-(581-b)=292
987-(x+364)=519

Answer 1

643 - 581 + b = 292
62 + b = 292
b = 292 - 62
b = 230

987 - x - 364 = 519
623 - x = 519
- x = 519 - 623
- x = - 104
x = 104