Question

7. Rezolvați ecuațiile:​

Answer 1

Explicație pas cu pas:

a) 3x - 3 + 2 = 5

3x - 1 = 5

3x = 5+1

3x = 6

x = 6 : 3

x = 2

b) 4x - 16 +5x + 15 = - 2

9x - 1 = - 2

9x = - 2 +1

9x = - 1

x = - 1/9

Answer 2

$\it a)\ \dfrac{x-1}{2}+\dfrac{1}{3}=\dfrac{5}{6}|_{\cdot6} \Rightarrow 3x-3+2=5 \Rightarrow 3x-1=5|_{+1} \Rightarrow 3x=6 \Rightarrow x=2\\ \\ \\ b)\ \dfrac{x-4}{5}+\dfrac{x+3}{4}=-\dfrac{1}{10}|_{\cdot20} \Rightarrow 4x-16+5x+15=-2 \Rightarrow 9x-1=-2 \Rightarrow\\ \\ \\ \Rightarrow 9x=-2+1 \Rightarrow 9x=-1 \Rightarrow x=-\dfrac{1}{9}$