X * 150 +480= 430+150
5/9:x=2/5
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Bài 2:
a: 4x+320=480
=>4x=160
hay x=40
b: 150-x:7=120
=>x:7=30
hay x=210
\(\Rightarrow\frac{x+10}{490}+\frac{x+20}{480}+\frac{x+30}{470}+\frac{x+40}{460}+\frac{x+50}{450}+5=0\)
\(\Rightarrow\frac{x+10}{490}+1+\frac{x+20}{480}+1+\frac{x+30}{470}+1+\frac{x+40}{460}+1+\frac{x+50}{450}+1=0\)
\(\Rightarrow\frac{x+500}{490}+\frac{x+500}{480}+\frac{x+500}{470}+\frac{x+500}{460}+\frac{x+500}{450}=0\)
\(\Rightarrow\left(x+500\right).\left(\frac{1}{490}+\frac{1}{480}+\frac{1}{470}+\frac{1}{460}+\frac{1}{450}\right)=0\Rightarrow x+500=0\Rightarrow x=-500\)
2.x+3.x=430
=> x ( 2 + 3) = 430
=> x . 5 = 430
=> x = 430 : 5 = 86
75-5.x=30
=> 5x = 75 - 30
=> 5x = 45
=> x= 9
Vậy x = 9
2.x+3.x=430 75-5.x=30
2x+3x=430 75-5x=30
5x=430 5x=45
x=86 x=9
a)\(x\cdot150+480=430+150\)
\(x\cdot150+480=580\)
\(x\cdot150=580-480=100\)
\(x=100:150=\frac{2}{3}\)
b) \(\frac{5}{9}:x=\frac{2}{5}\)
\(x=\frac{5}{9}:\frac{2}{5}=\frac{25}{18}=1\frac{7}{18}\)
~học tốt~.
\(x\cdot150+480=430+150\)
\(x\cdot150+480=580\)
\(x\cdot150=580-480\)
\(x\cdot150=100\)
\(x=150:100\)
\(x=\frac{3}{2}\)
\(\frac{5}{9}:x=\frac{2}{5}\)
\(x=\frac{5}{9}:\frac{2}{5}\)
\(x=\frac{5}{9}\cdot\frac{5}{2}\)
\(x=\frac{25}{18}\)
Dấu \(\cdot\) là dấu nhân