(17x-26).52016=52018
7x-2x=62+44:11
7x-4.710=3.710
2x+3+2x=144
720:[41-(2x-5)]=40
120+[(999-9x):60].24=480
5x+9x+6x= 60+17x
(2x-12)(3x-24)=0
TIM X
(2x-12)(3x-24)=0
=>2x-12=0 hoặc 3x-24=0
=>x=6 hoặc x=8
tíc mình nha
1. Tìm x, biết :
a. 1440: [120-(3x+9)] =120
b. 120+ [(999-9x):60].24 =480
c. (3x-48).6 =33.32+23.32 = 122
d. x10 = x
e. (2x-15)5 = (2x -15)3
f. 6.2x + 7.2x = 13.29
a. 1440 : [ 120 - (3x + 9 ) ] = 120
120 - (3x + 9) = 1440 : 120 = 12
3x + 9 = 120 - 12 = 108
3x = 108 - 9 = 99
x = 99 : 3 = 33
b. 120 + [ ( 999 - 9x ) : 60 ] . 24 = 480
[ ( 999 - 9x ) : 60 ] . 24 = 480 - 120 = 360
( 999 - 9x ) : 60 = 360 : 24 = 15
( 999 - 9x ) = 15 . 60 = 900
9x = 999 - 900 = 99
x = 99 : 9 = 11
117x(36+62)-17x(62+36)
= (36 + 62) x (117 - 17)
= 98 x 100 = 9800
Tìm x biết 120+[(999-9x):60].24=480
120+[(999-9x):60].24=480
[(999-9x):60].24 = 480 - 120
[(999-9x):60].24 = 360
[(999-9x):60] = 360 : 24
[(999-9x):60] = 15
(999-9x) = 15 x 60
(999-9x) = 900
9x = 999 - 900
9x = 99
x = 99 : 9
x = 11
120+[(999-9x):60]=480-120
[(999-9x):60].24=360
(999-9x):60=360:24
(999-9x):60=15
(999-9x)=15.60
999-9x=900
990x=900
x=990:900
x=?
120+[(999-9x):60].24=480
[(999-9x):60].24 = 480 - 120
[(999-9x):60].24 = 360
[(999-9x):60] = 360 : 24
[(999-9x):60] = 15
(999-9x) = 15 x 60
(999-9x) = 900
9x = 999 - 900
9x = 99
x = 99 : 9
x = 11
Tìm xEN
a. 720 : [118- (2x + 10)]=60
b. 2840+ [(999 - 9x ) : 60 ] x 24 = 3200
c. ( 3x - 48 ) x 6 = 33 . 22 - 23 . 32
Tìm x
120+ [ (999-9x) /60 ]= 480/24
Tình bày ra nhé
120+[(999-9x)/60]=480/24
120+[(999-9x)/60]=20
999-9x=20-120
999-9x=-100
9x=999-(-100)
9x=1099
x=1099/9
Vậy x=1099/9
Bài:Chia 1 biến đã sắp xếp 1)(2x^3+11x^2+18x-3):(2x+3) 2)(2x^3+11x^2+18x-3):(3x+3) 3)(2x^3+9x^2+5x+41):(2x^2-x+9) 4)(13x+41x^2+35x^3-14):(5x-2) 5)(5x^2-3x^3+15-9x):(5-3x) 6)(-4x^2+x^3-20+5x):(x-4)
1: \(\dfrac{2x^3+11x^2+18x-3}{2x+3}\)
\(=\dfrac{2x^3+3x^2+8x^2+12x+6x+9-12}{2x+3}\)
\(=x^2+4x+3-\dfrac{12}{2x+3}\)
tìm x
17x – ( -16x – 37) = 2x +
-2x –3. (x – 17) = 34 – 2(-x + 25
17x + 3. ( -16x – 37) = 2x + 43 - 4x
103 -57: [-2. (2x – 1)2 – (-9)0] = -106
3x – 32 > -5x + 1
15 + 4x < 2x – 145
-3. (2x + 5) -16 < -4. (3 – 2x)
-2x + 15 < 3x – 7 < 19 – x
x + (x+1) + (x+2) + (x+3) + .... + 13 + 14 = 14
25 + 24 + 23 +...+ x + (x - 2) + (x – 3) = 25
17x + 3. ( -16x – 37) = 2x + 43 - 4x
<=>17x-48x-111=-2x+43
<=>-29x=154
<=> \(x=-\frac{154}{29}\)
-3. (2x + 5) -16 < -4. (3 – 2x)
\(\Leftrightarrow-6x-31< -12+8x.\)
\(\Leftrightarrow-14x< 19\Rightarrow x< -\frac{19}{14}\)
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