Решить уравнения (n-589):67=80 1700:a+1300=3000
(n-589):67=80 n-589 = 80×67 n-589 = 5360 n = 5360+589 n = 5949 1700:a+1300=3000 1700:a=3000-1300 1700:a=1700 a = 1700:1700 a = 1