Question

1000=1000*10*x^3-25*10
x=?

Answer 1

$1000 = 1000 \cdot 10 \cdot x^3 - 25 \cdot 10 |:10\\ 100 = 1000 \cdot x^3 - 25 |:25\\ 4=40 \cdot x^3 -1\\ 40 \cdot x^3=4+1\\ 40 \cdot x^3=5\\ x^3= \frac{5}{40} \\ x^3= \frac{1}{8} \\ x= \sqrt[3]{\frac{1}{8}} \\ x= \sqrt[3]{(\frac{1}{2})^3} \\ x= \frac{1}{2}$

Answer 2

1000*10х³=100*10+25*10
1000х³=100+25
1000х³=125
х³=125/1000
х3=1/8
х=1/2