Question

Tìm x biết

\(219-7.\left(x+1\right)=100\)

\(\left(3x-6\right).3^{100}=3^{103}\)

\(x-5^6:5^3=2^3:2^2=0\)

\(2018^{x-3}=2018\)

Answer 1

219 - 7 . ( x+1) = 100

7 . ( x + 1 ) = 219 - 100 = 119

x+ 1= 119:7= 17

x = 17-1=16

Answer 2

(3x - 6 ). 3¹⁰⁰ = 3¹⁰³ 2018^x-3 = 2018

3x - 6 = 3¹⁰³ : 3¹⁰⁰ 2018^x-3 = 2018¹

3x - 6 = 3³ =27 Do x-3=1 cho nên suy ra x=4

3x = 27 + 6

3x = 33

x = 33:3

x = 11

Answer 3

a: =>7(x+1)=119

=>x+1=17

=>x=16

b: =>3x-6=27

=>3x=33

=>x=11

c: =>x-125+2=0

=>x=123

d: =>x-3=1

=>x=4