21-4x-24x+45=18 решите

Question

21-4x-24x+45=18 решите

Answer 1

21-4x-24x+45=18
21-4x-24x=18-45
21-4x-24x=(-27)
4x-24x=(-27)+21
4x-24x=(-6)
x*(4-24)=(-6)
-20x=(-6)
x=(-6):(-20)
x=0,3

Answer 2

21 - 4х - 24х + 45 = 18
21 - 4х - 24х = 18 - 45 = -27
-4х - 24х = 21 - 27 = -6
-28х = -6
х = -6 : (-28) = 6/28 = 3/14