3 x - x = 12
=> x * ( 3 - 1 ) =12
=> x * 2 =12
=> x = 12 : 2
=> x = 6
Vậy x = 6
Ta có: 3x - x= 12
=> 2x = 12
=> x = 12 : 2
=> x = 6
Tìm số nguyên x
a)(2x+5)÷(2x+1)
b)(3x+5)÷(x+1)
c)(3x+8)÷(x-1)
d)(5x+12)÷(x-2)
e)(7x-12)÷(x+16)
Tìm số nguyên x thỏa mãn a)(2x+5)÷(2x+1) b)(3x+5)÷(x+1) c)(3x+8)÷(x-1) d)(5x+12)÷(x-2) e)(7x-12)÷(x+16)
Tìm x biết : x/12 = 4/3x - 3 + 1/12
Tìm x biết:
(x-3)(x^2+3x+9)-(3x-17)=x^3-12
Tìm x
a) 3x - 10 = 2x + 13
b) x + 12 = -5 - x
c) x + 5 - 10 - x
d) 6x + 2 ^ 3 = 2x - 12
e) 12 - x = x + 1
f) 14 - 4x = 3x + 20
tìm x
a, x - 7 + 3x = 5 - 3x + 1 + 3x - (-3)
b, 1 - 2x = -12 + x +4
Tìm stn x,biết: a, 2 x ( 15 - 3x ) = 12 b, 39 - 2 x ( 31 - 3x ) - 15
Tìm x biết :
a)(3x-3)+(x-2)=(2x-2)-(x-1).
b)(4x-3)+(3x+5)=3x-2.
c)(6x-8)-5(x+2)=2x-12.
d)(9x-2)-4(2x+5)=-12.
tìm X, biết
4(x-12)-2=50
120-(3x-9)=1440:12
15-[x]=6
