5.X/2-3=3/10.15
5.x/2-3=9/2
5.x/2=9/2+3
x/2=15/2:5
x=3/2.2
x=3
^^ungr hộ nha
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Tìm x,biết:2/5:3/5xX+4/7=1/3+4/7
Tìm X thuộc N biết
a)100-7:(X-5)=65 b)12x(X-3):3=4^3+2^3
c)20+5xX=5^5:5^3 d)5xX-201+2^4x4
e)(2xX+3)^2=49 g)(7xX+3)^3=800+5^2:8
f/ 11x(X+2) = 5xX + 40
g/ 11x(X-6) = 4xX + 11
h/ (3xX - 4) : X + 10 = 12
k/ (5xX + 7) : X + 20 = 26
m/ Xx1999 - X = 1999x1997+1999
f/ 11x(X+2) = 5xX + 40
g/ 11x(X-6) = 4xX + 11
h/ (3xX - 4) : X + 10 = 12
k/ (5xX + 7) : X + 20 = 26
m/ Xx1999 - X = 1999x1997+1999
Bài 8: tìm x
a) x + 10 = 20
b) 2 . x + 15 = 35
c) 3 ⋅ ( x + 2 ) = 15
d) 10 . x + 15 . 11 = 20 . 10
e) 4 . ( x + 2 ) = 3 . 4
f) 33 x + 135 = 26 . 9
g) 2 . x + 15 + 16 + 17 = 100
h) 2 . (x + 9 + 10 + 11) = 4 . 12 . 25
Bài 8: tìm x
a) x + 10 = 20
b) 2 . x + 15 = 35
c) 3 ⋅ ( x + 2 ) = 15
d) 10 . x + 15 . 11 = 20 . 10
e) 4 . ( x + 2 ) = 3 . 4
f) 33 x + 135 = 26 . 9
g) 2 . x + 15 + 16 + 17 = 100
h) 2 . (x + 9 + 10 + 11) = 4 . 12 . 25
Tìm x 2^3 x + 5^2 x = 2 * ( 5^2 + 2^3 ) - 33 15 : ( x + 2 ) = ( 3^3 + 3 ) : 10