\(\left(-18-12\right):5\)

\(=-\left(18+12\right):5\)

\(=-30:5\)

\(=-6\)

\(61,894+530,89\)

Vậy \(61,894+530,89=592,784\)

\(249,087-187,89\)

Vậy \(249-0,87-187,89=61,197\)

\(14,63\times34,7\)

Vậy \(14,63\times34,7=507,661\)

i = my                            it= its

you = your                     we= our

he= his                      you= your..

she= her                     they= their

\(xx+x+5=125\)

\(xxx+5=125\)

\(3x+5=125\)

\(3x=125-5\)

\(3x=120\)

  \(x=120:3\)

  \(x=40\)

mình check lại nhé:

\(\left(\dfrac{3}{4}-\dfrac{1}{4}\times x\right)\times\dfrac{11}{33}=\dfrac{15}{8}\)

\(\left(\dfrac{3}{4}-\dfrac{1}{4}\times x\right)=\dfrac{15}{8}:\dfrac{11}{33}\)

\(\dfrac{3}{4}-\dfrac{1}{4}\times x=\dfrac{45}{8}\)

        \(\dfrac{1}{4}\times x=\dfrac{3}{4}-\dfrac{45}{8}\)

        \(\dfrac{1}{4}\times x=-\dfrac{39}{8}\)
                \(x=-\dfrac{39}{8}:\dfrac{1}{4}\)

                \(x=-\dfrac{39}{2}\)

`P/s `: @Ko Tên . Chj sửa rồi nhé!

\(\left(x-10\right).\left(25-x\right)=0\)

\(=>\left[{}\begin{matrix}x-10=0\\25-x=0\end{matrix}\right.=>\left[{}\begin{matrix}x=10\\x=25\end{matrix}\right.\)

Vậy \(x\in\left\{10;25\right\}\)

\(\left(\dfrac{3}{4}-\dfrac{1}{4}\times x\right)\times\dfrac{11}{33}=\dfrac{15}{8}\)

\(\left(\dfrac{3}{4}-\dfrac{1}{4}\times x\right)=\dfrac{15}{8}:\dfrac{11}{33}\)

\(\left(\dfrac{3}{4}-\dfrac{1}{4}\times x\right)=\dfrac{15}{8}\times3\)

\(\left(\dfrac{3}{4}-\dfrac{1}{4}\times x\right)=\dfrac{45}{8}\)

\(\dfrac{1}{2}\times x=\dfrac{45}{8}\)

        \(x=\dfrac{45}{8}:\dfrac{1}{2}\)

        \(x=\dfrac{45}{8}\times\dfrac{2}{1}\)

       \(x=\dfrac{45}{4}\)

`3 × x + 4 × x = 140`

`(3 + 4) × x     = 140`

`7 × x = 140`

`       x = 140 ÷ 7`

`       x = 20`

Vậy`x = 20`

Đề lỗi.Bạn xem lại đề!

s là phụ âm câm.