Răspuns:
a) [tex]\frac{x}{12}[/tex] = [tex]\frac{\frac{4+3}{12} }{7}[/tex] 7x= 12* [tex]\frac{4+3}{12}[/tex]
7x = [tex]\frac{12*(4+3)}{12}[/tex] 7x= 7 => x= 7:7=1 x=1
f) [tex]x^{2}[/tex]= 8*(14+[tex]2^{2}[/tex]) [tex]x^{2}[/tex]= 8* (14+4)
[tex]x^{2}[/tex]= 8*18 [tex]x^{2}[/tex]=144 => x= [tex]\sqrt{144}[/tex]= 12 x= 12
