Question

25 - ( 4^x - 7 ) : 3 = 6

Answer 1

25 - (4^x - 7) : 3 = 6

<=> 25 - (4^x : 3 - 7 : 3) = 6

<=> \(25-\dfrac{4^x}{3}+\dfrac{7}{3}=6\)

<=> \(\dfrac{4^x}{3}=-\left(6-25-\dfrac{7}{3}\right)\)

<=> \(\dfrac{4^x}{3}=\dfrac{64}{3}\)

<=> 4^x = 64

<=> 4^x = 4³

<=> x = 3

Answer 2

25 - ( 4^x - 7 ) : 3 = 6

( 4^ x - 7 ) : 3 = 25 – 6

( 4^x – 7 ) :3 = 19

4^x – 7 = 19 x 3

4^ x – 7 = 57

4^x = 57 + 7

4^x = 64

=> x = 3