a: =>2x=-13/15
hay x=-13/30
\(a,\dfrac{1}{5}+2x=-\dfrac{2}{3}\\ \Rightarrow2x=-\dfrac{2}{3}-\dfrac{1}{5}\\ \Rightarrow2x=-\dfrac{13}{15}\\ \Rightarrow x=-\dfrac{13}{15}:2\\ \Rightarrow x=-\dfrac{13}{30}\\ b,4\left(x-0,5\right)-8\left(x-1,5\right)=3,2\\ \Rightarrow4x-2-8x+12=3,2\\ \Rightarrow-4x+10=3,2\\ \Rightarrow-4x=3,2-10\\ \Rightarrow-4x=-6,8\\ \Rightarrow x=\left(-6,8\right):\left(-4\right)\\ \Rightarrow x=1,7\)
a,2x=\(\dfrac{-2}{3}\) -\(\dfrac{1}{5}\)
2x=\(\dfrac{-13}{15}\)
x=\(\dfrac{-13}{15}\) :2
x=\(\dfrac{-13}{60}\)
b,4x - 2 - 8x + 12 = 3,2
-4x + 10 = 3,2
-4x = 3,2 -10
-4x = -6,8
x =-6,8 : (- 4)
x = 1,7
