Question

Rezolvati ecuatiile:​

Answer 1

Scuze că nu putui sa ți le rezolv pe toate

Answer 2

$\it a)\ 2\{7\cdot[10-3(x+5)]-10\}=-6|_{:2} \Rightarrow 7\cdot[10-3(x+5)]-10=-3|_{+10} \Rightarrow \\ \\ \Rightarrow 7\cdot[10-3(x+5)]=7|_{:7}\Rightarrow 10-3(x+5)=1 \Rightarrow 10-1=3(x+5)\Rightarrow \\ \\ \Rightarrow 9=3(x+5)|_{:3} \Rightarrow 3=x+5|_{-5} \Rightarrow x=-2$