bantu jawab dong ka no 21 sampai 25

21.
2x + 2 = 6x + 12
2x - 6x = 12 - 2
-4x = 10
x = 10/-4 = -2,5 (C.)

22. D
23 . gak ada jawaban seharusnya
ab = bc
24.
3x + 2 > 14
3x > 14-2
3x >12
x > 4

25. A