Question

Tìm x, biết;\(\left(2,4x-36\right):1\frac{5}{7}=-1\)

Answer 1

\(\left(2,4x-36\right)=-1.\frac{12}{7}\)

\(\left(2,4x-36\right)=\frac{-12}{7}\)

\(2,4x=\frac{-12}{7}+36\)

\(2,4x=\frac{240}{7}\)

\(x=\frac{240}{7}:2,4\)

\(x=\frac{100}{7}\)

Answer 2

\(\left(2,4x-36\right):1\frac{5}{7}=-1\)

2,4x - 36 = -1 . \(\frac{12}{7}=\) -12/7

2,4x = -12/7 + 36 = 240/7

x = 240/7 : 2,4 = 100/7 

Answer 3

\(\left(2,4x-36\right):1\frac{5}{7}=-1\)

\(\left(\frac{12}{5}x-36\right):\frac{12}{7}=-1\)

\(\left(\frac{12}{5}x-36\right)=-1.\frac{12}{7}\)

\(\left(\frac{12}{5}x-36\right)=-\frac{12}{7}\)

 

Answer 4

Xin lỗi mình ấn nhầm, mình làm lại:

\(\left(2,4x-36\right):1\frac{5}{7}=-1\)

\(\left(\frac{12}{5}x-36\right):\frac{12}{7}=-1\)

\(\left(\frac{12}{5}x-36\right)=-1.\frac{12}{7}\)

\(\left(\frac{12}{5}x-36\right)=-\frac{12}{7}\)

\(\frac{12}{5}x=-\frac{12}{7}+36\)

\(\frac{12}{5}x=\frac{240}{7}\)

\(x=\frac{240}{7}:\frac{12}{5}\)

\(x=\frac{100}{7}\)