(x - 6)2 - 9 = 0
(x - 6)2 = 9 = 32
x - 6 = 3
x = 9
(x - 6)2 - 9 = 0
=> (x - 6)2 = 9 = 32 = (-3)2
TH1: ( x - 6)2 = 32
=> x - 6 = 3
=> x = 9
TH2: (x - 6)2 = (-3)2
=> x - 6 = -3
=> x = 3
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
tim x biet 2/(x+2)+(x+4)+4/(x+4)+(x+6)+6/(x+6)+(x+14)=x/(x+2)+(x+14)
1) 2⁴ .x -3.5x = 5² - 2⁴ 2) 3² .x +2²x =26.2² -13
5) 6² x -5²x = 11.2 -11. 3) 5² .x - 2⁴ x = 3⁴ -16.3²
6) 7² x - 6² x =13.2³ - 26. 4) 7² .x - 14 x = 7² .10 -70
Giúp mình với vì tối nay mình phải đi học rồi
Tìm x
2.(x-5)-3(x+6)+=4(x-7)3(x-1)-2(x+5)=2(x-3)5(1-x)-6(1+x)=7(3-x)2x+5-3(3x+7)=6(1-x)+8x-2+3(x-4)=5(x-6)+7x+2+3(1-x)-5(2-x)=6(1-x)+(3-x)a,x - 1/2 - (-1/6)
b,x + 5/6 = 3/8
c,2/3 . x -1/2 = 5/6
d, x/7 = 6/-21
e,(7/3 x -0,6) : 3^2/5 = 1
f,x/45 = 5/6 + -29/30
g,(4,5 - 2x) . (-1^4/7) =11/14
h,-2/7 + 4/7x=5/7
3|x+4| - 2(x-1) = 7 - 2x
2|x -6| + 7x - 2= |x-6| + 7x
|x+8| + 5(x-2) = 5x - 10 :2
|x+2| - 6(x-4) = 20 - 6x
Tìm x
7 . x - 2. x = 6^17 : 6^15 + 44 : 11
100 - ( 2 . x + 6) . 2 = 4^2
Bài 1: Tìm x :A) 3/4.(x-2) - 1/2.(6-2.x)= 1/6.x + 5
B) -1/2.(3.x + 5) - 2/3.(9-6.x) = 3/5.(x-10) - 3
C) (1/4.x - 1,5) + (5/6.x - 3) - (5/8.x -0,5) = -4,5
1 Tìm x:
a) 5.(1-x)-6.(1+x)=7.(3-x)
b) 2.(x+5)-3.(3x+7)=6.(1-x)+8x
c) x-2+3.(x-4)=5.(x-6)+7
d) x+2+3.(1-x)-5.(2-x)=6.(1-x)+7.(3x)
