x + 25%.x = 125
x + 1/4. x = 125
x. (1+1/4) = 125
x. 5/4 = 125
x = 125:5/4
x = 100
x+25%x=125
=>x(1/4+1)=125
=>x.5/4=125
=>x=125:5/4
=>x=100
Vậy x=100
Suy ra 100%x+25%x=125
Suy ra 125=1/4+1
125=5/4 x
x=125:5*4=100
x + 25%x = 125
1 . x + 1/4.x = 125
(1 + 1/4).x = 125
5/4.x = 125
x = 125 : 5/4
x = 100
\(x+25\%x=125\)
\(1x+\frac{1}{4}x=125\)
\(x\cdot\left(1+\frac{1}{4}\right)=125\)
\(x\cdot\frac{5}{4}=125\)
\(x=125:\frac{5}{4}\)
\(x=500\)
