Вправи 601 - 726 » 620

Розв’яжи рівняння. x – 650 = 1000 х = 1000 + 650 х = 1650________ 1650 – 650 = 1000 1000 = 1000 k – 456 = 234 + 78 k – 456 = 312 k = 312 + 456 k = 768_______ 768 – 456 = 312 312 = 312 c – 205 = 42280 с = 42280 + 205 с = 42485________ 42485 – 205 = 42280 42280 = 42280 b + 731 = 3912 b = 3912 – 731 b = 3181________ 3181 + 731 = 3912 3912 = 3912