a, 14-3x = -x + 4
-3x + x = 4-14
-2x = -12
2x =12
x= 6
b, x-12 = -9--15
x-12 = 6
x=18
c, 16- I 5 - 2xI = 9
I 5 -2x I = 16-9
I 5-2x I = 7
\(\hept{\begin{cases}5x-2x=7\\5x-2x=-7\end{cases}}\hept{\begin{cases}2x=-2\\2x=12\end{cases}}\)
\(\hept{\begin{cases}x=-1\\x=6\end{cases}}\)
hok tốt
Tim so nguyen x,y biet
a) (x+5) mu 2 + (2y - 8 ) mu 2 = 0
b)(x + 3).(2y - 1 ) = 5
tim so nguyen x
(3x+9).(3x-6)=0(2x+15)-25=47-(10-x)30(x=2)-6(x-5)-24x=100/4-3x/=8/2x-5/=13/7x+3/=66tinh hop li:
12-12+11+10-9+8-7+5-4+3+2-1
tim so nguyen x :
3x+27=9
2x+12=3(x-7)
2x^2-1=49
-|9-x|-5=12
cho:A=(-a-b+c)-(-a-b-c)
a)rut gon A
b)tinh gia tri cua A khi a=1;b= -1;c= -2
tim so nguyen x biet
a,9-25=[7-x]-[25+7]
b,-26-[x-7]=0
c,30+[32-x]=10
d,2.x-18=10
e,3.x+26=5
f,/x/-5=-12+30
g,[/x/+1].[4-2x]=0
h,8+/x/=/-8/+11
i,4.[x+1]-[3x+1]=14
tim so nguyen x
(3x - 25) - (x - 9) = 2 - x
2x + (-73 - 120) - (20 - 120) = 5
Tim cac so nguyen x, biet:
1. -10<x<-5
2. -4<hoac= x <hoac=3
3. n+9<x<hoac=n+12
4. n+15<x<n+15
5. x<-9 va x<9
6. |x|=|10|
7. |x|=20 va x>0
8. |x|=-100
9. |-5|+|-9|+x=14+|12|
10. 8+x=|-8|+20
bai 1)tim x biet
a )24-(36+5)=x
b)14-21=(13-x)-(15+8)
bai 2) tim x biet
a)17-x=-25+(-16+9)
b)3x-21=-19-(-2x)
cau 1.tim x
a)15-|x-4|=6
b)-30+|25-x|=-1
c)x-(12-25)=-8
d) (x-29)-(17-38)=-9
cau 2.tim so nguyen x
a,22-(-x)=12
b,(x+5)+(x-9)=x+2
c,(27-x)+(15+x)=x-24
Tim so nguyen x
a) (3x - 25) - (x - 9) = 2 - x
b) 2x + (-73 - 120) - (20 - 120)=5
Giup tui voi "^"
