\(\frac{15}{7}+\left(-\frac{8}{7}\right):x=\frac{14}{5}\\\frac{8}{7}:x= \frac{14}{5}-\frac{15}{7}\\ \frac{8}{7}:x=\frac{23}{35}\\ x=\frac{8}{7}:\frac{23}{35}\\ x=\frac{280}{161}\)2cau sau chuyen ve
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
b1:
[4+2x]=-3x [3x-1]+2=x
[x+15]+1=3x [2x-5]+x=2
b2:
[2x-5]=x+1 [3x-2]-1=x
[3x-7]=2x+1 [2x-1]+1=x
Tìm x biết:
a) 4(18-5x) - 12(3x-7) = 15(2x-16) - 6(x+14)
b) 5(3x+5) - 4(2x-3) = 5x+3(2x+12)+1
c)2(5x-8) - 3(4x-5) = 4(3x-4) + 11
d) 5x-3 {4x-2 [4x-3(5x-2)]}=182
Tìm x biết:
1, | 3x -5 |-1/7=1/3
2, (3/5x - 2/3x - x) .1/7=-5/21
3, 1/3x - 2=3/5
4, 0,2+|x-2,3| = 1,1
5, (5x-1).(2x+1/3) =0
6. 2/3: x +6 =4
7, 5.(x+2)3 + 7=2
8, 5|x+1| /2= 90/ |x+1|
9, 14- |3x/2 -1 |= 9
Giúp mk vs ạ
a, 2x( 3x + 1 ) + 3x ( 4 - 2x ) = 7
b, 4(18 - 5x ) - 12( 3x - 7 ) = 15(2x - 16 ) - 6(x + 14 )
c, ( 3x + 2 ) ( 2x + 9 ) - ( x + 2 ) ( 6x + 1 ) = ( x + 1 ) - ( x - 6 )
Tìm x
Giải bất phương trình bài toán sau :
1. 8x-1/9 +3x-2/4<43+8x/12 + 35x/36
2. 5x-17/14+x-3/26 > 29-9x/91
3. x-2/5+2(x+1)/3 > 13x-8/15
4. x/30+1/6-x/5 > 2x/45+16
5. 8x+5/6+4x+3/6<3(x-2)/30
6. x+7/10-x-5/5>x-9/3
7. 9(x-1)-2(3x+4)<3(x-1)
8. x+7/4-2x-3/7<2x+3/8-8x+5/28
a) |x - 1/2 |= 1/3
b) 14/15 : 9/10= x : 3/7
c) 6/5 : 8 = 2/5 : x
d) 3x - 7 / 8 = 5/2
e) x/2 = 8/x
g) 5/9 :x = 7/4 : 3/10
giúp mk vs mk tick cho
tinh so huu ti x
2/3x-3/12=4/5-(7/x-2)
2x-3/3+-3/2=5-3x/6-1/3
tim x
(x-1).(x-2)>0
2x-3<0
(2x-4).(9-3x)<0
moi nguoi giup minh nhe cam on nhieu
Tìm x
a) 6x(5x + 3) + 3x(1 – 10x) = 7 b) (3x – 3)(5 – 21x) + (7x + 4)(9x – 5) = 44
c) (x + 1)(x + 2)(x + 5) – x2(x + 8) = 27
d) 5x(12x + 7) – 3x(20x – 5) = - 100
e) 0,6x(x – 0,5) – 0,3x(2x + 1,3) = 0,138
