Question

[Quỳnh Anh]

Tìm x để :

7*x​/8 - 5*(x-9) = 20*x+1,5/6

Answer 1

[KAl(SO4)2·12H2O]

\(\frac{7.x}{8}-5.\left(x-9\right)=20.x+\frac{1,5}{6}\)

\(\Leftrightarrow7.x-5.\left(x-9\right)=20x.8+\frac{1,5}{6}.8\)

\(\Leftrightarrow7.x-40\left(x-9\right)=160x+2\)

\(\Leftrightarrow7x-40+360=160x+2\)

\(\Leftrightarrow-33x+360=160x+2\)

\(\Leftrightarrow-33x=160x+x-360\)

\(\Leftrightarrow-33x=160x-358\)

\(\Leftrightarrow-33x-160x=160x-358\)

\(\Leftrightarrow-193x=-358\)

\(\Rightarrow x=\frac{358}{193}\)

Answer 2

[KAl(SO4)2·12H2O]

Khong chac nhe