Đặt: \(\frac{x}{-9}=\frac{y}{-6}=k\Rightarrow x=-9k\)

                                            \(y=-6k\)

Ta có:

\(-4x-5y=594\)

\(\left(-4\right)\cdot\left(-9\right)k-5\cdot\left(-6\right)k=594\)

\(36k-\left(-30\right)k=594\)

\(k\left[36-\left(-30\right)\right]=594\)

\(k\cdot66=594\)

\(k=594:66=9\)

Vì \(x=-9k\Rightarrow x=\left(-9\right)\cdot9=-81\)

    \(y=-6k\Rightarrow y=\left(-6\right)\cdot9=-54\)

Vậy x=-81

       y=-54

Walking

Mai and Hoa are classmates. The often go to school on fool.

Tick mk nha!

My father plays football every Sunday afternoon.

Tick mk nha!

A >/  0+0 + 300 vì x² >/0; x⁴ >/0

=> A min =300 khi x =0

chữ nhỏ tế này sao mf thấy đc bn oy

442,4725

tick cho

minh nha