ADTC của dãy tỉ số bằng nhau ta đc:

\(\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}=\dfrac{x-2y+3z}{2-6+12}=\dfrac{32}{8}=4\)

Suy ra:\(\dfrac{x}{2}=4=>x=4.2=8\)

\(\dfrac{y}{3}=4=>y=3.4=12\)

\(\dfrac{z}{4}=4=>z=4.4=16\)

Vậy \(x=8\)

       \(y=12\)

       \(z=16\)

\(=\dfrac{9}{4}-[\dfrac{1}{4}-\dfrac{9.1}{3}]\)

\(=\dfrac{9}{4}-[\dfrac{1}{4}-\dfrac{9}{3}]\)

\(=\dfrac{9}{4}--\dfrac{11}{4}\)

\(=5\)

Hình 1:x=180-71-41=68

Hình 2:X=180-55-90=35

Hình 3:x=180-35-28=117

C.Duyên

\(\left|1,5-x\right|=0,25-0\)

\(\left|1,5-x\right|=0,25\)

\(\left[{}\begin{matrix}1,5-x=0,25\\1,5-x=-0.25\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=1,5-0,25\\x=1,5-\left(-0,25\right)\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=1,25\\x=1,75\end{matrix}\right.\)

Vậy...

em nhầm ko để ý ạ :)

S+be+the (more)+adj(er)+of+the+N

C.the cleavrer

1. I do my home work
I don't my home work
2. Henry rides his bicycle.
Henry doesn't ride his bicycle.
3. The boys run in the yard.
The boys don't run in the yard.
4. It rains a lot in the south.
It doesn't rain a lot in the south
5. You are very punctual.
You aren't very punctual.
6. My mother is a bank clerk.
My mother isn't a bank clerk.
7. His father drives a new bike.
His father doesn't drive a new bike.
8 Her sister buys a loaf of bead.
Her sister doesn't buy a loaf of bead.
9. They are teachers in our school.
They aren't teachers in our school.
10 We usually watch Tv in the evening.
We don't usually watch Tv in the evening

1.are

2,are