1.
a) 2x + 5 = 34 : 32
b) ( 3x - 24 ) . 73 = 2.74
c) [ 3 . ( 42 - x ) + 15 = 23 . 3
d) 126 + ( 132 - x ) = 300
2.
a) 120 - ( x + 55 ) = 60
b) ( 7x - 11)3 = 25 .52 + 200
c) 2x + 2x+4 = 544
3.
a) 10 + 2x = 49 : 47
b) 70 - 5 ( x - 3 ) = 45
c) 4 + 95 : x = 143 : 142 - 23
tim x
-2x(6x-2)+3x(4x-7)=8
(7x-2)(2x+3)-(3x-5)(4x+6)=2x2-5
+(-2x+3)-6x(3x-4)=-22x2+7x
tìm x:
1) 25x + 3 ( 4- 6x ) = 50
2) 4 ( 2x + 3 ) + 2 ( 3x + 1) = 120
3) 2 ( 3x + 2 ) + 3 ( 4x + 1 ) = 200
tìm x
1) 25x + 3 ( 4 - 6x ) = 50
2) 4 ( 2x + 3 ) + 2 ( 3x + 1 ) = 120
3) 2 ( 3x + 2 ) + 3 ( 4x + 1 ) = 200
Tim x: ?
1) 25x + 3 ( 4 - 6x ) = 50
2) 4 ( 2x + 3) + 2 ( 3x + 1 ) = 120
3 ) 2 ( 3x + 2 ) + 3 ( 4x + 1 ) = 200
giải giúp mình với các bạn ơi mai mình nộp cho thầy rồi bạn nào nhanh nhất mình tick cho!
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
1)a)2x-13=25+6x
b)12-x=3x+6
c)40-(25-2x)=x
d)|x-3|=5
e)|x-3|+(x+2)+(x+1)=12
2)tính
a)(-1).(-2).(-3).(-4).(-5).[(-3)-(-5)]
b)1-2+3-4+5-6+...-98+99
3)tim x
a)(x-1).(y-2)=5
b)x.(y-3)=12
A,3^3. x-3^4=2^5-5
B,(2^3+2^1). x+3^2.x?5-10=10^2
C,(2^x+1)^3.2^2=500
D,(7x-11)^3=32.5^2+200
E,5.(3x-2)^2-3^3:3^2=2
F,(x-5)^19=16.( x-5)^6
G,4^x+80=3^yy
Tim x va y thuoc N
Tìm x
a) 315 + (146 -x ) =401
b) (6x - 39 ) : 3 =201
c) 7x - x = 5 mũ 21 :5 mũ 19 + 3.2 mũ 2 - 70
d) 7x - 2x = 617 : 615 +44 :11
e) 0 :x = 0
f) 3 mũ x = 9
g) 9 mũ x -1 = 9
h) (2x +1 ) mux3 = 125
i) 2 mũ x - 15 =17
k) (7x - 11 )mũ 3 = 25 . 5 mũ 2 +200
l) 3 mũ x + 25 = 26. 2 mũ 2 + 2 . 3 mũ 0
m) 5 .2 mũ x + 4 .2 mũ x = 18 . 2 mũ 5