Question

решите уравнения 305+×+55=1000

Answer 1

305 + x + 55 = 1000;
305 + 55 + x = 1000;
360 + x = 1000;
x = 1000 - 360;
x = 640.

Answer 2

305+×=1000-55
305+×=945
×=945-305
×=640