Question

(-0,4) . ( 2x + 2/5) = -9,4

Answer 1

\(\left(-0,4\right).\left(2x+\dfrac{2}{5}\right)=-9,4\)

\(2x+\dfrac{2}{5}=\dfrac{9,4}{0,4}=23,5\)

\(2x=23,5-\dfrac{2}{5}=23,1\)

\(x=\dfrac{23,1}{2}=11,55\)

Answer 2

\(2x+\dfrac{2}{5}=\left(-9,4\right):\left(-0,4\right)\\ 2x+\dfrac{2}{5}=\dfrac{47}{2}\\ 2x=\dfrac{47}{2}-\dfrac{2}{5}\\ 2x=\dfrac{47.5-4}{10}\\ 2x=\dfrac{231}{10}\\ x=\dfrac{231}{20}\)

Answer 3

=>2x+2/5=23,5

=>2x=23,1

hay x=231/20