on mess khum m :"))

\(2,=2\sqrt{6}\left(\sqrt{6}-3\sqrt{3}+5\sqrt{2}-\sqrt{2}\right)\\ =2\sqrt{6}\left(\sqrt{6}-3\sqrt{3}+4\sqrt{2}\right)\\ =2.6-2\sqrt{6}.3\sqrt{3}+2\sqrt{6}.4\sqrt{2}\\ =12-18\sqrt{2}+16\sqrt{3}\\ 10,=\left[\left(3\sqrt{3}\right)\left(\sqrt{3}-1\right)\right]:3\sqrt{15}\\ =\dfrac{\sqrt{5}}{5}.\left(\dfrac{-\sqrt{15}+3\sqrt{5}}{45}\right)\\ =\dfrac{3-\sqrt{3}}{45}\)

\(x-y=1\\=>x=1+y\\ 3^x.3^{3y}.3^8=3^{13}\\ 3^{x+3y+8}=3^{13}\\ x+3y+8=13\\ x+3y=5\\ 1+y+3y=5\\ 1+4y=5\\ 4y=4\\ y=1=>x=1+1\\ x=2\)

Bài 1

\(a,\\ =a+b+c+d-a-b-c\\ =d\\ b,\\ =3a+4b-5c-3a+2b+5c+17\\ =6b+17\\ c,\\ =2a-4b+6c-3a-9b-6c-2022\\ =-a-13b-2022\)

=))

\(a,4478+y=11280\\ y=11280-4478\\ y=10500\\ b,y\times25=21250\\ y=21250:25\\ x=850\)