Question

x+1 supra x = 12 supra 11
2x+1 supra 2 = 3 supra x+1

Answer 1

a.x+1/x=12/11
⇒11[x+1]=12x
⇒11x+11=12x
⇒12x-11x=11
⇒x=11;
b. 2x+1/2=3/x+1
⇒2x+1·x+1=2·3
⇒[2x+1]·[x+1]=6
⇒2x+1=3⇒2x=3-1⇒2x=2⇒x=1
x+1=3⇒x=3-2⇒x=1;
verificare [2+1]·[1+1]⇒3·2=6;