Найди значение x в уравнениях.
x + x + x = 30;
x * 43 = 43 : x;
x − 18 = 16 − 6;
x + 20 = 12 + 8.
x + x + x = 30
x * 3 = 30
x = 30 : 3
x = 10
x * 43 = 43 : x
x = 1
x − 18 = 16 − 6
x − 18 = 10
x = 10 + 18
x = 28
x + 20 = 12 + 8
x + 20 = 20
x = 20 − 20
x = 0