Tìm số tự nhiên x:
a) 3^10 . 3^2x -1 . 2^10 = 6^10 . 9^13 . 27
b) 5^3x - 2 . 125 =5^13. 125^5
c) 3^x+2 . 2^x= 9. 6^10
d) 3^x - 3^x = 26. 9^7
A, (25-5).(-2) mũ 2 -31.(-7-13)
B, 215+ (-38) -(-58) +90 - 85
C, 26.(-125) -125 . (-36)
D.4. (-3) mũ 3 +2 . (-2)-20
a) 25 . 8 - 12 . 5 + 272 : 17 - 8
b) 125 : 25 + 14 - 142 : 71
c) 13 . 17 - 256 : 16 + 14 :7 -1
d) 15 . 24 - 14 . 5 ( 145 : 5 - 27 )
2, Tìm X, biết:
a) 37 + x = 55
b) x - 31 = 24
c) 21 ( x - 11 ) = 21
d) 9 . ( x - 29 ) = 0
e) ( x - 1954 ) . 5 = 50
f) 30 . 60 - x = 30
Tìm x,biết:
A) 8 + ( x - 9)= 125 - 64
B) 5×(x+7) -10 = 8×5
C) 7 × 7 - 7( 13 - 2× x) = 14
D) 320 : (x - 1) = ( 125 - 5 ×5 ) : 4 + 15
E) 240 : ( x -5 ) = 4 × 5 ×5 - 60 : 3
F) 49 × x - 14 × x = 49 × 10 - 70
Tìm x, biết:
a) 5.2²+(x+3)=5²
b)2³+(x-3²)=5³-4³
c)4.(x-5)-2³=2⁴.3
d)5.(x+7)-10=2³.5
e)7²-7.(13-x)=14
f)5x-5²=10
g)9x-2.3²=3⁴
h)10x+2².5=10²
i)125-5.(4+x)=15
j)2⁶+(5+x)=3⁴
bài 1:tìm x biết
a,(125-x)+25=98
b,100:(x+20)=68:34
c,(3.x+12).5=25.4-10
d,210:(2.x-3)-20=10
Bài 2.Tìm x biết
a,10x + 65=125
b,45-(5-2x)^3=2.3^2
c,2(x-3)-12=(-10)
d,x-12=(-13)+1+|-13|
1/2×(2×x-3)+105/2=-137/2 A,-12×25-25×75-25×13 B,-50/7×49/10-35/2×-10/7+ -25/3× -9/5 C,-354+265-156+125 D,-74+40-50+16-35 E,-2/3×4/5+-4/5×4/3-0,125
tìm x biết
a 100-7x(x-5)=65
b 12x(x-3):3=64+8
c 26+5x=125:5
d 5x-201=2x2x2x2x2
Bài 2:Tính(hợp lí )
a)25*37
b)125*18
c)102*35
Bài 3 :Tìm x biết :
a)x -7 =13
b) 2 * x - 7 =13
c) 2*(x-1) -7 =13
d) (x-1) :7 - 7 =14
e) 32 - x : 2 =5
g) 100 - 97 .x = 3
Ai nhanh mình sẽ tick cho nha .