( 3 x ( x + 2 ) : 7 ) x 4 = 120
( 3 x ( x + 2 ) : 7 ) = 120 : 4
3 x ( x + 2 ) : 7 = 30
3 x ( x + 2 ) = 30 x 7
3 x ( x +2 ) = 210
x + 2 = 210 : 3
x + 2 = 70
x = 68
[ 8 x - 120 ÷ 4 ] ×3^3=3^6
123-5 (x+4)=38
(3x- 2^4)×7^3=2×7^4
[3×(x+2)÷7]×4=120
275-(113+x)+63=158 ; [3.(x+2):7].4=120 help
Mik cần gấp [3.(x+2):7].4=120
2. tìm x
a) \(\left(x-1\right)^3=8\)
b) \(7^{2x-6}=49\)
c) \(\left(2x-14\right)^7=128\)
d) \(x^4.x^5=5^3.5^6\)
e) \(\left[3.\left(x+2\right):7\right].4=120\)
Tìm x thuộc n
[3*(x+2)/7]*4=120
Tìm x thuộc n
[3*(x+2)/7]*4=120
chú ý
/ là phần
a) x- 6/7 = 5/2
b) 12/7 : x + 2/3 _ 7/5
c) 2/3 . x + 3/4 = 3
d) 720 : [ 41 - ( 2x -5 )]= 120
e) x + x . 1/4 : 2/7 + x : 2/9 =255
a) x+ 3/4 =1
b) 1/2. x + 5 = -1
c) 3/4 : (2/3.x +-1/5)=6
d) -5/6 . 120/25<x<-7/15 . 9/14 với x thuộc z
