\(7+\dfrac{5x}{3}=x-2\\ \Leftrightarrow21+5x=3x-6\\ \Leftrightarrow5x-3x=-6-21\\ \Leftrightarrow2x=-27\\ \Leftrightarrow x=-\dfrac{27}{2}\)
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Bài 2: Phương trình bậc nhất một ẩn và cách giải
Các câu hỏi tương tự
a.dfrac{5x+2}{6}-dfrac{8x-1}{3}dfrac{4x+2}{5}-5
b.x-dfrac{2x-5}{5}+dfrac{x+8}{6}7+dfrac{x-1}{3}
c.dfrac{x+1}{15}+dfrac{x+2}{7}+dfrac{x+4}{4}+60
d.dfrac{x-342}{15}+dfrac{x-323}{17}+dfrac{x-300}{19}+dfrac{x-273}{21}10
e.dfrac{x+97}{125}+dfrac{x-63}{35}dfrac{x-7}{21}+dfrac{x-77}{49}
Đọc tiếp
a.\(\dfrac{5x+2}{6}-\dfrac{8x-1}{3}=\dfrac{4x+2}{5}-5\)
b.\(x-\dfrac{2x-5}{5}+\dfrac{x+8}{6}=7+\dfrac{x-1}{3}\)
c.\(\dfrac{x+1}{15}+\dfrac{x+2}{7}+\dfrac{x+4}{4}+6=0\)
d.\(\dfrac{x-342}{15}+\dfrac{x-323}{17}+\dfrac{x-300}{19}+\dfrac{x-273}{21}=10\)
e.\(\dfrac{x+97}{125}+\dfrac{x-63}{35}=\dfrac{x-7}{21}+\dfrac{x-77}{49}\)
Giải các phương trình
1,\(3x-1=0\\\) 4, \(\dfrac{x}{3}-\dfrac{x}{5}=4\)
2, \(2-x=3x+1\) 5, \(\dfrac{x-1}{4}+\dfrac{2x+1}{6}=\dfrac{3}{2}\)
3, \(2\left(x-2\right)-1=5x\)
a/8(3x-2) - 13x =5(12 - 3x) +7x
b/\(\dfrac{5x}{x+2}-\dfrac{3}{x-2}+\dfrac{3x^2+6}{\left(x-2\right)\left(x+2\right)}=0\)
c/\(\dfrac{x}{2\left(x-3\right)}+\dfrac{x}{2x+2}=\dfrac{2x}{\left(x+1\right)\left(x-3\right)}\)
giải pt
\(\dfrac{x-1}{x+2}-\dfrac{x}{x-2}=\dfrac{5x-2}{4-x^2}\)
Giải các phương trình
a)3x-22x-3 c)11x+42-2x100-9x-22
b)2x+35x+9 d)2x-(3-5x)4(x+3)
e)dfrac{3x+2}{2}-dfrac{3x+1}{6}dfrac{5}{3}+2x
f)dfrac{x+4}{5}-x+4dfrac{x}{3}-dfrac{x-2}{2}
g)(2x+1)(x-1)0
h)(x+dfrac{2}{3})(x-dfrac{1}{2})0
i)(3x-1)(2x-3)(2x-3)(x+5)0
k)3x-152x(x-5)
m)left|x-2right|3
n)left|x+1right|left|2x+3right|
j)dfrac{7x-3}{x-1}dfrac{2}{3}
đ)dfrac{2left(3-7xright)}{1+x}dfrac{1}{2}
y)dfrac{x+5}{x-5}-dfrac{x-5}{x+5}dfrac{20}{x^2-25}
dfrac{1}{x-1...
Đọc tiếp
Giải các phương trình
a)3x-2=2x-3 c)11x+42-2x=100-9x-22
b)2x+3=5x+9 d)2x-(3-5x)=4(x+3)
e)\(\dfrac{3x+2}{2}-\dfrac{3x+1}{6}=\dfrac{5}{3}+2x\)
f)\(\dfrac{x+4}{5}-x+4=\dfrac{x}{3}-\dfrac{x-2}{2}\)
g)(2x+1)(x-1)=0
h)(x+\(\dfrac{2}{3}\))(x-\(\dfrac{1}{2}\))=0
i)(3x-1)(2x-3)(2x-3)(x+5)=0
k)3x-15=2x(x-5)
m)\(\left|x-2\right|=3\)
n)\(\left|x+1\right|=\left|2x+3\right|\)
j)\(\dfrac{7x-3}{x-1}=\dfrac{2}{3}\)
đ)\(\dfrac{2\left(3-7x\right)}{1+x}=\dfrac{1}{2}\)
y)\(\dfrac{x+5}{x-5}-\dfrac{x-5}{x+5}=\dfrac{20}{x^2-25}\)
\(\dfrac{1}{x-1}+\dfrac{2}{x+1}=\dfrac{x}{x^2-1}\)
giải phương trình
\(\dfrac{2x-1}{x^2-4x+4} + \dfrac{5x}{x-2} - \dfrac{25x}{5x-10} = 0\)
1 tháng 2 2023 lúc 21:21
Giải các phương trình sau1)dfrac{x+1}{85}+dfrac{x+3}{83}dfrac{x+5}{81}+dfrac{x+7}{79}2)dfrac{x-1}{2015}-dfrac{x+3}{2011}dfrac{x+7}{2007}-dfrac{x+11}{2003}3)dfrac{x+4}{4}-dfrac{x-3}{6}dfrac{x}{3}4)x-dfrac{x+1}{3}dfrac{2x+1}{5}5) dfrac{2x-7}{5}+dfrac{x+11}{2}-4giúp em vs ạ, em đang cần gấpem c.ơn trước ạ
Đọc tiếp
Giải các phương trình sau
1)\(\dfrac{x+1}{85}+\dfrac{x+3}{83}=\dfrac{x+5}{81}+\dfrac{x+7}{79}\)
2)\(\dfrac{x-1}{2015}-\dfrac{x+3}{2011}=\dfrac{x+7}{2007}-\dfrac{x+11}{2003}\)
3)\(\dfrac{x+4}{4}-\dfrac{x-3}{6}=\dfrac{x}{3}\)
4)\(x-\dfrac{x+1}{3}=\dfrac{2x+1}{5}\)
5) \(\dfrac{2x-7}{5}+\dfrac{x+11}{2}=-4\)
giúp em vs ạ, em đang cần gấp
em c.ơn trước ạ
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
Câu 1: Thực hiện phép tính
\(\dfrac{3}{7}x^2< 28x^5-7^3-\dfrac{14}{3}x^2-2\)