Q.

Penjelasan dengan langkah-langkah:

2 1/5 – 9/13 x 5

2 1/5 – 45/13

2 1/5 – 3 6/13

2 13/65 – 3 30/65

– 3 30/65 + 2 13/65

– 1 47/65

3^x + 2 = 9^x-2

3^x+2 = 3^(2 . (  x – 2 )

3^x+2  = 3^2x – 4

x + 2 = 2x – 4

–  x = – 4 – 2

– x = – 6

x = 6