Решите уравнение:
1) 9x = −54;
2) 1,2x = −6;
3) 13x = −6;
4) −21x = 48;
5)
9x = −54
x = −54 : 9
x = −6
1,2x = −6
x = −6 : 1,2
x = −5
13x = −6
−21x = 48
−3,78 : x = −0,6
x = −3,78 : (−0,6)
x = 6,3
18 : (−x) = 0,6
−x = 18 : 0,6
−x = 30
x = −30
