Question

Tìm x, biết:

2) \(\left(\dfrac{1}{6}+2\dfrac{1}{2}-10,75\right).x-7=\left(\dfrac{2}{5}+\dfrac{3}{8}+0,025\right):0,1\)

Answer 1

2) \(\left(\dfrac{1}{6}+2\dfrac{1}{2}-10,75\right)\cdot x-7=\left(\dfrac{2}{5}+\dfrac{3}{8}+0,025\right):0,1\)

\(\left(\dfrac{1}{6}+\dfrac{5}{2}-\dfrac{43}{4}\right)x-7=\left(\dfrac{2}{5}+\dfrac{3}{8}+\dfrac{1}{40}\right):\dfrac{1}{10}\)

\(-\dfrac{97}{12}x-7=\dfrac{4}{5}\cdot10\)

\(-\dfrac{97}{12}x=8+7\\ -\dfrac{97}{12}x=15\\ x=15:\left(-\dfrac{97}{12}\right)\\ x=-\dfrac{180}{97}\)