Question

Va rog ajuti d
Aflati solutia
Dau coroana ajutati urgent
aflati solutia
3x-2=0
1/2x+1=0
2/5x-3/4=0
-0.1x+8=0
Scriti pas de pas tot ! va rog

Answer 1

Explicație pas cu pas:

1. 3x-2=0

3x=2

x=2/3

S{2/3}

2. 1/2x+1=0

x=-2

S{-2}

3. 2/5 x - 3/4=0

8x=15

x=15/8

4.  -0,1x+8=0

-0,1x=-8               (inmulteste)

x=80

Answer 2

$\it a)\ 3x-2=0 \Rightarrow 3x=2 \Rightarrow x=\dfrac{2}{3},\ \ S=\Big\{\dfrac{2}{3}\Big\} \\ \\ \\ b)\ \dfrac{1}{2}x+1=0|_{\cdot2} \Rightarrow x+2=0 \Rightarrow x=-2\\ \\ \\ c)\ \dfrac{2}{5}x- \dfrac{3}{4}=0\Rightarrow \dfrac{2}{5}x=\dfrac{3}{4}|_{\cdot20} \Rightarrow 8x=15 \Rightarrow x=\dfrac{15}{8}\\ \\ \\ d)\ -0,1x+8=0|_{\cdot10} \Rightarrow -x+80=0 \Rightarrow 80-x=0 \Rightarrow x=80$