1/ x + 1/2 = -5/3 6/ x - 1/5 = 9/10
2/ 1/3 - x = 3/5 7/ x + 5/12 = 3/8
3/ 3-4 + x = 7/2 8/ x + 5/4 = 7/6
4/ x - 4/3 = -7/9 9/ x - 2/7 = 1/35
5/ x - -7/3 = 5/6 10/ x - 1/5 = -7/10
1/ x + 1/2 = -5/3
2/ 1/3 - x = 3/5
3/ 3-4 + x = 7/2
4/ x - 4/3 = -7/9
5/ x - -7/3 = 5/6
6/ x - 1/5 = 9/10
7/ x + 5/12 = 3/8
8/ x + 5/4 = 7/6
9/ x - 2/7 = 1/35
10/ x - 1/5 = -7/10
Tìm x
1; 3. ( x - 4) - ( 8 - x) = 12
2; 5. ( x - 6 ) - 2 ( x + 3) = 12
3; 5 - | x + 7| = 4
4; 6. | x - 7 | = 18 : (-3)
Bài 1: Tìm x,y ∈ Z
a) 15+(4-x)=31
b) (x-18)-16=29-(5+x)
c) -(x-7)+45=12+x
d) -12×(x-5)+7×(3-x)=5
e) |x-3|-16=-4
g) x+{(x-3)-[(x+3)-(-x-2)]}=x
Bài 6. Tìm x Z, sao cho:
a. (x – 3) – 12 = – 25
f. 121 – (35 – x) = 2.52
c. 72 – (84 – 9x) : 7 = 69
g. 2(17 + x) – (400 – 325) = – 31
d. (x + 7).(x – 5) =0
h. (x – 10).(x2 – 9) = 0
e. (x + 8).(x2 + 1) = 0
i. 17 – { – x + [– x – (– x)]} = – 16
-12(x-5)+7(3-x)=5
Bài 1:Tìm Giá trị nhỏ nhất
A=3(x+1)^2+5
B=2|x+y|+3x^2-10
C=12(x-y)^2 +x^2-6
D= -5/2^2+1
Bài 2:Tìm Giá trị lớn nhất
A=5-2x
B=3-(x+1)^2-3(x+2y)^2
C=-12-3|x+1|-2(y-1)^2
D=5/2x^2-3
F=-5/3-2x^2
a) -12(x-5)+7.(3-x)=5
a , 43 + ( 9 - 21 ) = 317 - ( x + 317 )
b , ( 15 - x ) + ( x - 12 ) = 7 - ( -5 + x )
c , x - { 57 - [ 42 + ( -23 - x )]} = 13 - { 47 + [ 25 - ( 32 - x )]}
d , -7 + | x - 4 | = -3
e , 13 - | x + 5 | = 13
g , | x - 10 | - ( -12 ) = 4
h , | x + 2 | < 5