-(-13+x)-14=6
(13+x)-14=6
13+x=14+6
13+x=20
x=20-13
x=7
tik nha
ai tik mk mk tik lai ch
-(-13+x) -14=6
-(-13+x) = 6+14
-(-13+x) = 20
-(-13+x) = -(-20)
-13+x = -20
x = -20 - (-13)
x = -20+13
x = -7
tick nha
-(-13+x)-14=6
(13+x)-14=6
13+x=14+6
13+x=20
x=20-13
x=7
tik nha
ai tik mk mk tik lai ch
-(-13+x) -14=6
-(-13+x) = 6+14
-(-13+x) = 20
-(-13+x) = -(-20)
-13+x = -20
x = -20 - (-13)
x = -20+13
x = -7
tick nha
bai1:tim x
a,x:13 va 13 <x<75
b,14:(2.x+3)
Tim x :
a) -25 + x = -14
d) 13 + x - 47 = 23
tim x biet 2/(x+2)+(x+4)+4/(x+4)+(x+6)+6/(x+6)+(x+14)=x/(x+2)+(x+14)
tim x thuộc z biet:(x-15)+(x-14)+(x-13)+......+19+20=0
giai nhanh ho minh nhe
15+14+13+...+x=0
tim x
x= -15
phai lam ra bai cu the
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)
1 ) tim x
A) (19x + 2 .52) : 14 = (13-8)2 - 42
B) 2 . 33 = 10 . 312 . 8 . 274
2) tim x thuoc N
a) 390 - ( x - 7 ) = 169 : 13
c) x - 6 : 2 - ( 48 - 24 ) : 2 : 6 - 3 = 0
d) x + 5 . 2 - ( 32 + 16 . 3 : 6 - 15 ) = 0
Tim so nguyen x biet
(19x + 2.52) : 14 = (13 - 8)2 - 42
-2x3 - 6 = 42 . 3
Tim x
10-2.x=25-3x
4.x-(3+5x)=14
|5x-12| < hoặc = 13