Question

[Bùi hải đăng]

3 nhân x³  trừ 30 : 5 = 7 nhân 3⁷

Answer 1

[Tẫn]

\(3\times x^3-30:5=7\times3^7.\)

\(3\times x^3-30:5=15309\)

\(3\times x^3-6=15309\)

\(3\times x^3=15309+6\)

\(3\times x^3=15315\)

\(x^3=15315:3\)

\(x^3=5105\)

\(x=17,21862954=17,2=\frac{86}{5}\)

Answer 2

[Bùi hải đăng]

thanks