Question

Ex 4 va rog frumos ofer coronita.Thank you

Answer 1

deschidem parantezele obtinem:
x/5-1/20=21/20
x/5=22/20
x=22/20*5 => x=22/4 => x=11/2 => x=5 intreg si 1/2, sau x=5,5
solutia apartine numerelor rationale pozitive

Answer 2

[tex] \frac{1}{10}(2x- \frac{1}{2})= \frac{21}{20} [/tex]
[tex] \frac{2x}{10}- \frac{1}{20}= \frac{21}{20} [/tex]
aducem la numitor comun adica 20 si vom avea
4x-1=21
4x=21+1
4x=22
$x= \frac{22}{4}$
$x= \frac{11}{2}$