Question

30 + 2.x = 4 mũ 2017 : 4 mũ 2015

Giúp mik nhé !! Đề ôn thi mik cần gắp mơn các bn.

Answer 1

\(30+2x=4^{2017}:4^{2015}\)

\(\Rightarrow30+2x=4^2=16\)

\(\Rightarrow2x=16-30=-14\)

\(\Rightarrow x=-14:2=-7\)

Answer 2

30 + 2x = 4²⁰¹⁷ : 4²⁰¹⁵

30 + 2x = 4²

30 + 2x = 16

        2x = 16 - 30

        2x = -14

          x = - 7

Answer 3

30+2.x =\(4^{2017}:4^{2015}\)

\(\Rightarrow30+2x=4^{2017-2015}\)\(\Rightarrow30+2x=16\)

\(\Rightarrow2x=-14\Rightarrow x=-7\)

Vậy x=

Answer 4

\(30+2x=4^{2017}:4^{2015}\)

\(\Rightarrow30+2x=4^2\)

\(\Rightarrow30+2x=16\)

\(\Rightarrow2x=-14\)

\(\Rightarrow x=-7\)