(-12).x-(-12).5+7.3-7.x=5
(-12).x+60+21-7.x =5
(-12).x-7.x =5-60-21
(-12).x-7.x =-76
x.[(-12)-7] =-76
x.-19 =-76
x =(-76):(-19)
x =4
(-12).x-(-12).5+7.3-7.x=5
(-12).x+60+21-7.x =5
(-12).x-7.x =5-60-21
(-12).x-7.x =-76
x.[(-12)-7] =-76
x.-19 =-76
x =(-76):(-19)
x =4
tìm x
a)-5.(-x+7)-3.(-x-5)=-4.(12-x)+48
b) (-x-7)-5.(-x-3)=12.(3-x)
c)-2.(15-3x)-4.(7x+8)=-5-9.(-2x+1)
d) (-3x-7) - 4.(-2x-11)=7.(4x+10)+9
Tìm x biết :
a) ( x-1):3=23
b) 12-2(x+5)=-10
c) x-12(x+5)=-10
d) 6-| x| =5
e) 13-x:2=10
f) | 12 -x | -7=5
i) x2 -7=2
k) x3 -4 =-12
m) 7\(⋮\) (x - 3 )
n) 3 \(⋮\) ( 2x+1)
5 . ( x - 7 ) - 4 . ( x + 5 ) = 3 . | - 5 | - 12
Tim x biết : -12(x-5)+7(3-x)=5
a)12.(x-5)+7(3-x)=5 b)2.x2-3=29
tìm xez , biết
a) |x - 3 | - 7 = 13
b) 72 - 3 . | x + 1 | = 9
c) 17 - ( 43 - |x| ) = 45
d) 3 | x - 1 | - 5 = 7
e) -12 ( x - 5 ) + 7 (3 - x ) = 5
Bài 1: Tìm x , biết:
1) x - 2 = -6 12) 3 . | x - 1 | - 5 = 7
2) -5 . x - ( -3 ) = 13 13) -12 . ( x - 5 ) + 7 . ( 3 - x ) = 5
3) 15 - ( x - 7 ) = -21 14) ( x - 2 ) . ( x + 4 ) = 0
4) 3 .x + 17 = 2 15) ( x - 2 ) . ( x + 15 ) = 0
5) 45 - ( x - 9 ) = -35 16) ( 7 - x ) . ( x + 19 ) = 0
6) ( -5 ) + x = 15 17) -5 < x < 1
7) 2 . x - ( -17 ) = 15 18) | x | < 3
8) | x - 2 | = 3 19) ( x - 3 ) . ( x - 5 ) < 0
9) | x - 3 | - 7 = 13 20) 2 . x2 - 3 = 29
10) 72 - 3 . | x + 1 | = 9 21) -6 . x - ( -7) = 25
11) 17 - ( 43 - | x | ) = 45 22) 46 =- ( x - 11 ) = -48
Tìm x : |x|-38/7*|x|-3/4=2|x|+(-8/7)
x*13/4+(-7/6)*x-5/3=5/12
93/17:x+(-4/17):x+22/7:52/3=4/11
a) -12.(x-5)+7(3-x)=15
b) 30.(x+2)-6.(x-5)-24.x=100