1,x=3x2
2,(x+5)(x-3)-(x-30)=0
3,(2x-6)(x+4)+2(2x-6)=0
4,(2x-5)(x+9)+6x-15=0
3,(2x-5)(x+6)+8x-20=0
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
A) 78-2x=42
B)6x+39=75
C) 2^3.x+ 2.x=25.2^2
D) 21+7x = 56
E) 5x +2x = 6^2-5^0
F)15x + 3x = 450 : 2+9
G) 6x+x=5^11: 5^9+3^1
H) 5x + 3x=3^11: 3^8.4+12
i) 2^3.x + 2^2.x =136-2^20 : 2^16
j) 7x -x= 5^21: 5^19+3.2^2
k) 7x - 2x= 6^17: 6^15 + 44 :11
l) 0: x =0 m) 3^x=27 n) 4^x= 64
o) 2^x = 32 p) 9^x-1=81 q) x^4=16
r) 3^x :3^
p) 9^x-1=81
q) x^4=165=1
Tìm x thuộc N,biết:
1) 42x-6 =1
2) (3x-9)7 = 0
3) (3-x)10x : (3-x)20 =1 (với x khác 3)
4) (x-6)3 = (x-6)2
5) { [ (2x+14):22 -3 ]:2 } -1 = 0
6) 10- {[(x:3+17) : 10 + 3.24 ]:10 } = 5
7) x10 = 1x
8) x10 = x
9) (2x - 15)5 = (2x - 15)3
10) ( 7x -11 )3 = 25.52 + 200
1. Tìm số tự nhiên x biết 1) 3^x . 3=243 2) 7.2^x=56 3) x^3=8 4)x^20=x 5) 2^x-15=17 6) (2x+1)^3=9.81 7) x^6:x^3=115 8) ( 2x-15)^5=(2x-15)^3 9) 3^x+2-5.3^x=36 10) 7.4^x-1+4^x+1=23 Giúp tớ bài này với
1) x(x-5) +3x=0
2) (2x-15) (3-x)=0
3)12+(3-x) tất cả mũ 3=-15
4)2x(x+2/3)-4x=0
5) 2/3x-3/2x=5/12
6)x-5/3 = 2x+1/4
7) x-1/-2= -8/x-1 ( với x khác 1)
8)1-x mũ 2=15/16
9) -2x mũ 3+ 3=13/4
10)(x-1/2) tất cả mũ 2=16/25
TRÌNH BÀY CÁC BƯỚC RÕ RÀNG
ĐÚNG YÊU CẦU SẼ TICK
|2x-5|-7=22
15-|2x+3|=8
(2x+4)(x^2+9)=0
2(x-5)-3(x-4)=-6+15.(-3)
Tìm x
(2x-7)+17=6
12-2.(3-3x)=-2
-14+3.(-x+5)=-20
-90:5.(-3-2x)=6
(x+1).(x-3)=0
(2x-2).(x+4)=0
(22+4).(x+3)=0
(5-x).(6-2x)=0
3.(x+1)+5=x+8
-4.(2x+9)-(-8x+3)-(x+13)=0