=>-1/2x-3/10x=3/2-7/10
=>-5/10x-3/10x=15/10-7/10
=>-8/10x=8/10
=>x=-1
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Chương I : Số hữu tỉ. Số thực
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5 tháng 12 2018 lúc 19:13
7/10 - 1/2x = 3/10x + 3/2
3.a: -3/2-2x+3/4=-4
b: (-2/3.x-3/5).(3/-2-10/3)=2/5
c: x/2-(3x/5-13/5)=-(7/5+7/10x)
d: (3/2-5/11-3/13).(2x-2)=(-3/4+5/22+3/26)
e: 2/3x-3/12=4/5-(7/x-2)
a,\(\dfrac{x+1}{2x+1}\)=\(\dfrac{0.5x+2}{x+3}\)
b,|9-7x|=5x-3
c,|10x+7|<37
Các bạn giúp mình với!!!
a)1/2x+3/5x=-33/22
b) (2/3x -4/7).(1/2+-3/7:x)=0
c) (4/5-2x).(1/3+3/5:x)=0
a)frac{-3}{2}-2x+frac{3}{4}-2
b)left(frac{-2}{3}x-frac{3}{5}right)left(frac{3}{-2}-frac{10}{3}right)frac{2}{5}
c)frac{x}{2}-left(frac{3x}{5}-frac{13}{5}right)-left(frac{7}{5}+frac{7}{10}.xright)
d)frac{2x-3}{3}+frac{-3}{2}frac{5-3x}{6}-frac{1}{3}
e)frac{2}{3x}-frac{3}{12}frac{4}{5}-left(frac{7}{x}2right)
k)frac{13}{x-1}+frac{5}{2x-2}-frac{6}{3x-3}
m)left(frac{3}{2}-frac{2}{-5}right):x-frac{1}{2}frac{3}{2}
n)left(frac{3}{2}-frac{5}{11}-frac{3}{13}right)left(2x-2right)left(frac{-3}{4}+frac{5}{22}+...
Đọc tiếp
a)\(\frac{-3}{2}-2x+\frac{3}{4}=-2\)
b)\(\left(\frac{-2}{3}x-\frac{3}{5}\right)\left(\frac{3}{-2}-\frac{10}{3}\right)=\frac{2}{5}\)
c)\(\frac{x}{2}-\left(\frac{3x}{5}-\frac{13}{5}\right)=-\left(\frac{7}{5}+\frac{7}{10}.x\right)\)
d)\(\frac{2x-3}{3}+\frac{-3}{2}=\frac{5-3x}{6}-\frac{1}{3}\)
e)\(\frac{2}{3x}-\frac{3}{12}=\frac{4}{5}-\left(\frac{7}{x}2\right)\)
k)\(\frac{13}{x-1}+\frac{5}{2x-2}-\frac{6}{3x-3}\)
m)\(\left(\frac{3}{2}-\frac{2}{-5}\right):x-\frac{1}{2}=\frac{3}{2}\)
n)\(\left(\frac{3}{2}-\frac{5}{11}-\frac{3}{13}\right)\left(2x-2\right)=\left(\frac{-3}{4}+\frac{5}{22}+\frac{3}{26}\right)\)
Giải giúp mk
mk đang cần ghấp trong hôm nay
cám ơn mọi người
tìm x
a, (2x - 3)\(^2\) = |3 - 2x|
b, (x - 1)\(^2\) + (2x - 1)\(^2\) - 0
c, x - 2\(\sqrt{x}\) = 0
d, (x - 1)\(^2\) + 1/7 = 0
1. tìm x biết
a, (2x - 3)\(^2\) = |3 - 2x|
b, (x - 1)\(^2\) + (2x - 1)\(^2\) = 0
c, 5 - x\(^2\) = 1
d, x - 2\(\sqrt{x}\) = 0
g, (x - 1) + \(\dfrac{1}{7}\) = 0
1)Tính giá trị biểu thức:
dfrac{left(13dfrac{1}{4}-2dfrac{5}{27}-10dfrac{5}{6}right).230dfrac{1}{25}+46dfrac{3}{4}}{left(1dfrac{3}{7}+dfrac{10}{3}right):left(12dfrac{1}{3}-14dfrac{2}{7}right)}
2)Tìm x biết:
a) 42+dfrac{3}{7}.left|3x-1right|12
b) left|2x-1right|left|x+2right|
c) 2.3^x.3^218 với xin N
Đọc tiếp
1)Tính giá trị biểu thức:
\(\dfrac{\left(13\dfrac{1}{4}-2\dfrac{5}{27}-10\dfrac{5}{6}\right).230\dfrac{1}{25}+46\dfrac{3}{4}}{\left(1\dfrac{3}{7}+\dfrac{10}{3}\right):\left(12\dfrac{1}{3}-14\dfrac{2}{7}\right)}\)
2)Tìm x biết:
a) \(42+\dfrac{3}{7}.\left|3x-1\right|=12\)
b) \(\left|2x-1\right|=\left|x+2\right|\)
c) \(2.3^x.3^2=18\) với \(x\in N\)
Thu gọn các đơn thức đồng dạng trong đa thức sau:
a) \(A=x^5-\dfrac{1}{2}x+7x^3-2x+\dfrac{1}{5}x^3+3x^4-x^5+\dfrac{2}{5}x^4+15\)
b) \(B=3x^2-10+\dfrac{2}{5}x^3+7x-x^2+8+7x^2\)
c) \(C=\dfrac{1}{7}x-2x^4+5x+6\)