\(\dfrac{x}{15}=\dfrac{3}{5}+\dfrac{-2}{3}\)
⇔ \(\dfrac{x}{15}\) = \(\dfrac{-1}{15}\)
⇔ x = -1
⇔
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BÀI 7 TÌM X BIẾT A].X=1/5+2/11 B]X/15 =3/5-2/3 C ] 11/8+13/6=85/X MỌI NGƯỜI GIÚP MÌNH VỚI THANK YOU
a,-8/3+7/5+-71/15<x<-13/7+19/14+-7/2
b,-19/6+-15/2+11/3<x<-5/4+19/12+-10/3
c,-6/7+3/35<x<-2/5+3/7
d,x=3/4+1/-12
e,x/14=1/7+-3/14
f,11/18+13/6=85/x
g,8/17+5/17<x/17<6/17+9/17
Giúp mình v
Bài10872917292872917 tìm x bt
5x-16=40+x
4x-10=15-x
-12+x=5x-2
7x-4=20+3x
5x-7=20+3x
x+15=7+6x
17-x=7-6x
3x+(-21)=12-8x
125:(3x-13)=25
541+(218-z)=735
3(2x+1)-19=14
175-5(x+3)=85
4x-40=|4|+12
x+15=20-4x
8x+|-3|=-4x+39
6(x-2)+(-2)=20-4x
Tìm x biết:
a,x-5/7=1/9
b,2x/5=6/2x+1
c,11/8+13/6=85/x
d,2x-2/11=1.1/5
e,x/15=3/5+-2/3
f,x/182=-6/14.35/91
Tìm x biet:
a,5/2x+x=32/15
b,x-7/2x=-32/15
c,-7/3x-7/4x+11/3=18/5
d,-5/6-3x=2/3
e,2x-5/9=-2/3
f,1/2-2/3x=7/12
g,7-|2x-3|=4
h,(19x+2.5^2):14=(13-8)^2-4^2
i,3/4x-2/3=2/7.1/6+5/7.1/6
k,(x+1/2).(2/3-2x)=0
l,x/2013-1/10-1/15-1/21-........-1/120=5/8
1: Thực hiện phép tínha: -14. ( 13-57)+57.(10-145)b: -38.(25-4)+(25.(-4+38)c: -39.(5-99)+99.(10-39)2: Tính nhanh a: 32+(-149)+(-311)+(-89)+(-51)b: 17-452-548c: 31+53-431d: 8-(2014-2008)+2014e: 1268-(78+1268)-(-78)f: -48795-(489-48795)+4g: (-33+180-75)-(180+25)3: Tìm x€ Z, biết: a: -2x -40 (5-x)- (-15+60)b: 2.(x-5)- 3.(x +7)14c: -7.(5-x) - 2.(x-10)15d: 5.(x-6)-2.(x+3)12e: 3.(x-6)- (8-x) 12f: 4.(x-5)- (x+7) -19g: 7.(x-3)-5.(3-x) 11-15h: x+18 6-2xi: 259-51|4x +3| (-10)^2.3 +10^1k: x+15 20- 4xl: -1...
Đọc tiếp
1: Thực hiện phép tính
a: -14. ( 13-57)+57.(10-145)
b: -38.(25-4)+(25.(-4+38)
c: -39.(5-99)+99.(10-39)
2: Tính nhanh
a: 32+(-149)+(-311)+(-89)+(-51)
b: 17-452-548
c: 31+53-431
d: 8-(2014-2008)+2014
e: 1268-(78+1268)-(-78)
f: -48795-(489-48795)+4
g: (-33+180-75)-(180+25)
3: Tìm x€ Z, biết:
a: -2x -40= (5-x)- (-15+60)
b: 2.(x-5)- 3.(x +7)=14
c: -7.(5-x) - 2.(x-10)=15
d: 5.(x-6)-2.(x+3)=12
e: 3.(x-6)- (8-x)= 12
f: 4.(x-5)- (x+7)= -19
g: 7.(x-3)-5.(3-x) =11-15
h: x+18= 6-2x
i: 259-51|4x +3|= (-10)^2.3 +10^1
k: x+15= 20- 4x
l: -12+ x = 5x-20
Giúp !
Tìm x e Z sao cho :
a) 2x - 7 = 15 - ( 2 - 3x )
b) 8 - ( x + 2 ) + ( 2x - 1 ) = 15 - ( 24 - 85 )
c) -( 4x + 7 ) - ( 5 - 2x ) = 13 - x
Bài toán 3 : Tìm x, biết.a. 2(x – 5) – 3(x + 7) 14 b. 5(x – 6) – 2(x + 3) 12c. 3(x – 4) – (8 – x) 12 d. -7(3x – 5) + 2(7x – 14) 28e. 5(3 – 2x) + 5(x – 4) 6 – 4x f. -5(2 – x) + 4(x – 3) 10x – 15g. 2(4x – 8) – 7(3 + x) |-4|(3 – 2) h. 8(x – |-7|) – 6(x – 2) |-8|.6 – 50k. -7(5 – x) – 2(x – 10) 15 l. 4(x – 1) – 3(x – 2) -|-5|m. -4(x + 1) + 89x – 3) 24 n. 5(x – 30 – 2(x + 6) 9o. -3(x – 5) + 6(x + 2) 9 p. 7(x – 9) – 5(6 – x) – 6 + 11xq. 10(x – 7) – 8(x + 5) 6.(-5) + 24
Đọc tiếp
Bài toán 3 : Tìm x, biết.
a. 2(x – 5) – 3(x + 7) = 14 b. 5(x – 6) – 2(x + 3) = 12
c. 3(x – 4) – (8 – x) = 12 d. -7(3x – 5) + 2(7x – 14) = 28
e. 5(3 – 2x) + 5(x – 4) = 6 – 4x f. -5(2 – x) + 4(x – 3) = 10x – 15
g. 2(4x – 8) – 7(3 + x) = |-4|(3 – 2) h. 8(x – |-7|) – 6(x – 2) = |-8|.6 – 50
k. -7(5 – x) – 2(x – 10) = 15 l. 4(x – 1) – 3(x – 2) = -|-5|
m. -4(x + 1) + 89x – 3) = 24 n. 5(x – 30 – 2(x + 6) = 9
o. -3(x – 5) + 6(x + 2) = 9 p. 7(x – 9) – 5(6 – x) = – 6 + 11x
q. 10(x – 7) – 8(x + 5) = 6.(-5) + 24
a) (x+15) - (-x+1) = -12
b) (x-2) - (2x-2) = -2
c) x+2 - (5x-16) = 4x-6
d) 15-3 . x+4 = 85-x
e) (-11)2 - 5 . (x-1) = 76+x
Bài 1:tính
a)65.(-19)+19.(-35)
B)85.(35-27)-35.(85-27)
c)47.(45-15)-47.(45+15)
bài2:tìm x
Tìm các số nguyên x biết (-2).(x+6)+6.(x-10)=8
(-4).(2x+9)-(-8x+3)-(x+13)=0
7x.(2+x)-(7x+3)=14
3.|x-2|+2x=19với x\(\le\)2
2.|3-x|-5x=-24với x\(\le\)3
|x+11|+|13-x|=0