Tìm x biết:
a) x – 345 094 = 123 357
b) x : 13 = 125
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) x – 345 094 = 123 357
x = 123 357 + 345 094
x = 468 451
b) x : 13 = 125
x = 125 x 13
x = 1625
123+x+2x=2x+345-236
<=>x+2x-2x=345-236-123
<=>x=-14
vậy x=-14
1324+x+x=125-2x-3x
<=>x+x-2x-3x=125-1324
<=>-3x=-1199
<=>x=\(\frac{1999}{3}\)
vậy x=\(\frac{1999}{3}\)
k mk nha mấy bạn
a) x – 123 = 345 b) x + 254 = 665
x = 345 + 123 x = 665 – 254
x = 468 x = 211
a) \(\left(5-x\right)\left(x-1\right)=-2x\left(x-1\right)\)
\(\Rightarrow\left(5-x\right)\left(x-1\right)+2x\left(x-1\right)=0\)
\(\Rightarrow\left(x-1\right)\left(5-x+2x\right)=0\)
\(\Rightarrow\left(x-1\right)\left(x+5\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}x=1\\x=-5\end{matrix}\right.\)
b) \(\left(x+3\right)^2-\left(x-13\right)\left(x+13\right)=0\)
\(\Rightarrow x^2+6x+9-x^2+169=0\)
\(\Rightarrow6x=-178\Rightarrow x=-\dfrac{89}{3}\)
\(123-\left(x+345\right)-2x=1792\)
\(\Leftrightarrow123-x-345-2x=1792\)
\(\Rightarrow-222-3x=1792\)
\(\Leftrightarrow-3x=1792+\left(-222\right)\)
\(\Leftrightarrow-3x=1570\)
\(\Rightarrow x=\frac{-1570}{3}\)
123 – (x + 345) – 2x = 1792
123 – x – 345 – 2x = 1792
–222 – 3x = 1792
–3x = 1792 + 222
–3x = 2014
=> x = – 2014/3
\(a,x-345094=123357\\ \Rightarrow x=123357+345094\\ \Rightarrow x=468451\\ b,x:13=125\\ \Rightarrow x=125\times13\\ \Rightarrow x=1625\)