Răspuns: [tex]x=-\frac{25}{13}[/tex]
Explicație pas cu pas:
1) Ducem toate fractiile la acelasi numitor(14)
[tex]\frac{4x-10}{14}+ \frac{7x+28}{14}=\frac{5x-7}{14} -\frac{7x}{14} <=> \frac{4x-10+7x+28}{14} =\frac{5x-7-7x}{14} <=> \frac{11x+18}{14} =\frac{-2x-7}{14}[/tex]
2) Inmultim in cruce [tex]\frac{11x+18}{14} =\frac{-2x-7}{14} <=> 14(-2x-7)=14(11x+18)[/tex] 14 se simplifica si ramane [tex]-2x-7=11x+18 <=> -25=13x <=> x=\frac{-25}{13} <=>x=-\frac{25}{13}[/tex]
