Решите уравнение:
а) 5 + x = 3;
б) −7 + x = −2;
в) x + 3 = −6;
г) 12 + x = −8;
д) x + 18 = 18;
е) −13 + x = −5;
ж)
Решение:
а) 5 + x = 3,
x = 3 − 5,
x = −2;
б) −7 + x = −2,
x = −2 + 7,
x = 5;
в) x + 3 = −6,
x = −6 − 3,
x = −9;
г) 12 + x = −8,
x = −8 − 12,
x = −20;
д) x + 18 = 18,
x = 18 − 18,
x = 0;
е) −13 + x = −5,
x = −5 + 13,
x = 8;
ж)
