Question

Answer 1

\(đk:6-5x\ne0\\ =>x\ne\dfrac{6}{5}\\ \dfrac{-5}{-14}=\dfrac{20}{6-5x}\\ =>\dfrac{5}{14}=\dfrac{20}{6-5x}\\ =>5\times\left(6-5x\right)=20\times14\\ =>5\times\left(6-5x\right)=280\\ =>6-5x=280:5\\ =>6-5x=56\\ =>5x=6-56\\ =>5x=-50\\ =>x=-10\left(t/mđk\right)\)

Answer 2

\(\dfrac{-5}{-14}=\dfrac{20}{6-5x}\\ \dfrac{5}{14}=\dfrac{20}{6-5x}\\ \dfrac{20}{56}=\dfrac{20}{6-5x}\\ 6-5x=56\\ 5x=6-56\\ 5x=-50\\ x=-50:5\\ x=-10\)