x-3/13+x-3/14=x-3/15+x-3/16
<=> x-3/13+x-3/14-x-3/15-x-3/16=0
<=> (x-3).(1/13+1/14-1/15-1/16)
<=> (x-3)=0 ( Vì 1/13+1/14-1/15-1/16>0)
<=> x-3=0 => x=3
Vậy x=3
x-3/13+x-3/14=x-3/15+x-3/16
<=> x-3/13+x-3/14-x-3/15-x-3/16=0
<=> (x-3).(1/13+1/14-1/15-1/16)
<=> (x-3)=0 ( Vì 1/13+1/14-1/15-1/16>0)
<=> x-3=0 => x=3
Vậy x=3
\(\frac{x-3}{13}+\frac{x-3}{14}=\frac{x-3}{15}+\frac{x-3}{16}\)
các bạn ơi, giúp mk đi, đừng lướt qua vội vàng mà TT.
Chia đa thức cho đơn thức sau: \(\left(3x^{15}y^{16}z^{14}-\frac{2}{7}x^{13}y^{15}z^{11}+x^{12}y^{14}z^{13}\right):\left(\frac{-7}{3}x^{12}y^{14}z^{11}\right)\)
Giải pt
x^2-4=2(x-2)(x+3)
giải pt
x+1/90+x+2/80=x+3/70+x+4/60
Tìm x
a, \(2x-\frac{1}{2}=\frac{2x+1}{4}-\frac{1-2x}{8}\)
b, \(\frac{x-3}{13}+\frac{x-3}{14}=\frac{x-3}{15}+\frac{x-3}{16}\)
11) (x^2+3/xy)^3
12) (x^2+2/x)^3
13) (3y+x/2)^3
14) (1 1/2xy+1)^3
15) (x^2/2+2/y)^3
16) (x^2+2x)^3
17) (x/5+5)^3
18) (1/y+2x)^3
19) (3x+4)^3
20) (2x+1/x^2)^3
Giải các phương trình sau
1) \(\frac{x-85}{15}+\frac{x-74}{13}+\frac{x-67}{11}+\frac{x-64}{9}=10\)
2)\(\frac{x-1}{13}-\frac{2x-13}{15}=\frac{3x-15}{27}-\frac{4x-27}{29}\)
3)\(\frac{1909-x}{91}+\frac{1907-x}{93}+\frac{1905-x}{95}+\frac{1903-x}{91}+4=0\)
4)\(\frac{x-90}{10}+\frac{x-76}{12}+\frac{x-58}{14}+\frac{x-36}{16}+\frac{x-15}{17}=15\)
giải các phương trình tích sau:
1, 3x(x-2) = 7(x-2)
2, 2x^2 = x
3, x^2(x^2+1) = 0
4, x^3+9x = 6x^2
5, (x+3)(x-3) = 16
6, (x-6)(x+4) = 2(x+1)
7, (x-1)^2 = 4
8, (2x+1)^2 = (x-1)^2
9,(x^2-1)(2x-1) = (x^2-1)(x+2)
10, x^2-9x+20 = 0
11, x^2+2x-15 = 0
12, x^3-4x^2+5x = 0
13,x^3+4x^2+x-6 = 0
14, x^3-3x^2+4 = 0
15, x^4+2x^3+2x^2-2x-3 = 0
16, (x^2+x)(x^2+x+1) = 6
mk cần gấp mai mk đi học
Giải phương trình
1) 16-8x=0
2) 7x+14=0
3) 5-2x=0
4) 3x-5=7
5) 8-3x=6
6) 8=11x+6
7)-9+2x=0
8) 7x+2=0
9) 5x-6=6+2x
10) 10+2x=3x-7
11) 5x-3=16-8x
12)-7-5x=8+9x
13) 18-5x=7+3x
14) 9-7x=-4x+3
15) 11-11x=21-5x
16) 2(-7+3x)=5-(x+2)
17) 5(8+3x)+2(3x-8)=0
18) 3(2x-1)-3x+1=0
19)-4(x-3)=6x+(x-3)
20)-5-(x+3)=2-5x