Question

Aflați x din proporția: a)x-1/2x = 1/3
b)x+1/3x-1 = 1/2​

Answer 1

Explicație pas cu pas:

(x-1)/2x=1/3=>2x=3(x-1)=>2x=3x-3=>x=3

S€{3}

(x+1)/(3x-1)=1/2=>3x-1=2(x+1)=>3x-1=2x+2=>x=3

S€{3}

Answer 2

$\it a)\ \dfrac{x-1}{2x}=\dfrac{1}{3}\Rightarrow 3x-3=2x \Rightarrow 3x-2x=3 \Rightarrow x=3\\ \\ \\ \dfrac{x+1}{3x-1}=\dfrac{1}{2}\Rightarrow 3x-1=2x+2 \Rightarrow 3x-2x=2+1 \Rightarrow x=3$