jika 9×+9-×= 51 maka 3× - 3-x=

9x + 9 - x = 51
8x = 51 - 9
8x = 42
x = 5,25

nilai
3x - 3 - x
= 2x - 3
= ( 2 . 5,25 ) - 3
= 10,5 - 3
= 7,5

9x + 9 - x =51
51 -9 = 9x + x
42 = 10x
x = 42/10
= 4,2

3.(4,2) - 3 - 4,2 = 5,4

maaf kalo salah