Question

125- 3.( x+8)= 77

( 7.x -11 )^3 =2^2 .5^2 -73

5^X+1 +5^X+2 =750

( 2.X -1)^2018 = ( 2.X -1 )^2019

PLSS TL CÂU HỎI MIK NHA MN

Answer 1

a: \(\Leftrightarrow3\left(x+8\right)=48\)

\(\Leftrightarrow x+8=16\)

hay x=8

c: \(\Leftrightarrow5^x\cdot30=750\)

hay x=2

Answer 2

125 - 3.(x + 8 ) = 77

3.(x + 8 ) = 125 - 77 = 48

x + 8 = 48 : 3 = 16

x = 16 - 8 = 8

( 7 . x - 11 )³ = 2² . 5² - 73

(7 . x - 11)³ = 4 . 25 - 73 

(7.x-11)³ = 27

27 = 3³

=> (7.x-11)³ = 3³

Vậy x = 2

Answer 3

125- 3.( x+8)= 77

( 7.x -11 )^3 =2^2 .5^2 -73

5^X+1 +5^X+2 =750

( 2.X -1)^2018 = ( 2.X -1 )^2019 x=2 hoặc 8