Question

Решите уравнения:
6х - 15 = 21
4х - 18 = 3(2х + 3)
х^2 + 2х - 63 = 0

Answer 1

1)6х-15=21; 6х=36; Х=6; 2)4х-18=3(2х+3); 4х-18=6х+9; -2х=27; Х=-13,5; 3)х^2+2х-63=0; Х1=-9, х2=7.