\(\dfrac{12}{24}=\dfrac{1}{2};\dfrac{12}{39}=\dfrac{1}{3};\dfrac{35}{105}=\dfrac{1}{3};\dfrac{120}{245}=\dfrac{24}{49};\dfrac{134}{402}=\dfrac{39}{67};\)

\(\dfrac{213}{1170}=\dfrac{1}{5};\dfrac{1221}{3663}=\dfrac{1}{3};\dfrac{2133}{33195}=\dfrac{711}{11065}.\)

làm tốt lắm

Đây nhé

\(4-\left(x-5\right)-2^3=2^4\cdot3.\)

 \(4-\left(x-5\right)-8=16\cdot3\)

 \(4-\left(x-5\right)-8=48\)

          \(-\left(x-5\right)=48-\left(4-8\right)\)

          \(-\left(x-5\right)=52\)

                \(x-5=-52\)

                      \(x=-52+5\)

                      \(x=-47.\)

\(Vậy...\)

xin lỗi ghi lộn bên rùi.

lx