Question

tinh

4^2.x-1=7.3^2

Answer 1

\(4^2x-1=7.3^2\)

<=>\(16x-1=7.9\)

<=>\(16x-1=63\)

<=>\(16x=64\)

<=>\(x=4\)

Answer 2

4² . x - 1 = 7 . 3²

4² . x - 1 = 7 . 9

4² . x - 1 = 63

16 . x      = 63 + 1

16 . x      = 64

x             = 64 : 16

x             = 4

Hoc tot!!!