x + 2971 = 5317
x = 5317 – 2971
x = 2346
12492 – x = 7543
x = 12492 – 7543
x = 4949
x – 72581 = 2143
x = 72581 + 2143
x = 74724
12371 + x = 19002
x = 19002 – 12371
x = 6631
Завдання №83
Розв’яжи рівняння:
x + 2971 = 5317
x = 5317 – 2971
x = 2346
12492 – x = 7543
x = 12492 – 7543
x = 4949
x – 72581 = 2143
x = 72581 + 2143
x = 74724
12371 + x = 19002
x = 19002 – 12371
x = 6631