x-(60-x)=25x/100+25x/100
x-60+x=25x+25x/100
x-60+x=x(25+25)/100
x-60+x=x.50/100
x-60+x=x.50/50.2
x-60+x=x/2
.....
tới đây thui, mình ko biết làm nữa
ko biết là đúng hay sai đâu nhoa
Bài 1:
\(a,\dfrac{62}{7}.x=\dfrac{29}{9}:\dfrac{3}{56}\)
\(b,\dfrac{1}{5}:x=\dfrac{1}{5}-\dfrac{1}{7}\)
\(c,x-\left(\dfrac{50x}{100}+\dfrac{25x}{200}\right)=11\dfrac{1}{4}\)(11 và 1/4 là hỗn số chứ ko phải là 11.1/4 các bn nhé)
\(d,x-\dfrac{25x}{100}=60-x+\dfrac{25x}{100}\)
Giải phương trình Ẩn t=\(\dfrac{5}{x}-\dfrac{x}{4}\)
\(x^2+\dfrac{100}{x^2}=35+24\left(\dfrac{5}{x}-\dfrac{x}{4}\right)\)
Bài 2:Tìm x biết:
a)\(\dfrac{1}{7}+x=\dfrac{-2}{3}\)
b)\(\dfrac{-2}{3}:x=\dfrac{-5}{6}\)
c)\(\left\{\dfrac{3}{5}-2x\right\}.\dfrac{5}{8}=1\)
d)\(\dfrac{3}{4}+\dfrac{2}{5}x=\dfrac{29}{60}\)
e)\(\dfrac{3}{4}+\dfrac{1}{4}:x=\dfrac{2}{5}\)
f)\(\dfrac{11}{12}-\left(\dfrac{2}{5}+x\right)=\dfrac{2}{3}\)
g)\(\left|X+\dfrac{1}{3}\right|-4=\dfrac{-1}{2}\)
h)\(\left(\dfrac{1}{32}\right)^x.8^{2x}=512\)
i)\(5,3x+\left(-3,3\right)x+1,7=-4,9\)
x + \(\dfrac{30}{100}\).x=-1,31
tìm x
(x-5) x 30%= 20 x \(\dfrac{x}{100}\)+5
Bài 1: Tìm X
a) (X-5)x30%= \(\dfrac{20xX}{100}\)+5
b) \(\dfrac{X+3}{X-2}\)∈ Z
TÌm x biết
a) \(1+\dfrac{1}{3}+\dfrac{1}{6}+\dfrac{1}{10}+....+\dfrac{1}{x\left(x+1\right):2}=1\dfrac{2019}{2021}\)
Tìm x :
\(\dfrac{2}{5}.\left(1-\dfrac{1}{2}x\right)-2x=\dfrac{1}{5}\)
Tìm x biết: (x-\(\dfrac{2}{3}\))\(^2\)=\(\dfrac{5}{6}\)
