2x-4+7=x-25
2x-x-4+7=25
x-4+7=25
x-4=18
=>x=22
CHÚC BẠN HỌC GIỎI
TK MÌNH NHÉ
<=> 2x - 4 + 7 = x - 25
<=> 2x - x = -25 + 4 - 7
<=> x = -28
tìm x biet
3 - ( 17 - x ) = -12
25 + ( -2 +x ) = 5
-25 - ( x - 7 ) = 0
30 + ( 32 - x ) = 10
tim x,biet
a, 1-[15+11] = x-[25-9]
b,2-x=17-[-5]
c, x-12=[-9]-15
d,9-25=[ 7- x] -[25+7]
giup mik vs
tim x biet : 25%x - 7/8 + x = 2/3x
bai 1 tim x biet
a) x+a =12
b)a-x=-8
c25-x=a
d)a-x-a=7
bai 2 tim x biet
a) -18-x=30
b)-25+x=-2 +9
c) -45-(x-1)=56
Tìm x . biet 7^5*7^2*x^7*x^4=7^m*x^n, Nhanh nhanh gium mik ai nhanh nhat like
tìm x, y\(\in N\)
biet: 25-\(y^2=8\left(x-2009\right)^2\)
tìm số nguyên x , biết
| x + 2 | = 0
|x - 3 | = 7 - ( -2 )
( 7 - x ) - ( 25 + 7 ) = -25
| x - 3 | = | 5 | + | -7 |
| x - 5 | = | -7 |
4 - ( 7 - x ) = x - ( 13 - 4)
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 x biet
x-(-25-17-2x)=6+x
45-/-27-(-25)-x/=7+27
