b ) \(2017-69.\left(11-x\right)=2^7:2^3\)
\(2017-69.\left(11-x\right)=2^4\)
\(2017-69.\left(11-x\right)=16\)
\(69.\left(11-x\right)=2017-16\)
\(69.\left(11-x\right)=2001\)
\(\left(11-x\right)=2001:69\)
\(11-x=29\)
\(x=11-29\)
\(x=-18\)
Vậy \(x=-18\)
Chúc bạn học tốt !!!
a ) \(20:\left(2x-3\right)=4\)
\(\left(2x-3\right)=20:4\)
\(2x-3=5\)
\(2x=5+3\)
\(2x=8\)
\(x=8:2\)
\(x=4\)
Vậy \(x=4\)
a) 20 : ( 2x - 3 ) = 4
( 2x - 3 ) = 20 : 4
2x - 3 = 5
2x = 5 + 3
2x = 8
x = 8 : 2
x = 4
Vậy x = 4
b) 2017 - 69 x ( 11 - x ) = 27 : 23
2017 - 69 x ( 11 - x ) = 24
2017 - 69 x ( 11 - x ) = 16
69 x ( 11 - x ) = 2017 - 16
69 x ( 11 - x ) = 2001
( 11 - x ) = 2001 : 69
11 - x = 29
x = 11 - 29
x = -18
Vậy x = -18
