Question

determinati numarul natural a care face posibila egalitatea: (a:5-2)×5+2=107)

Answer 1

(a:5-2)x5+2=107
(a:5-2)x5=107-2=105
(a:5-2)=105:5=21
a:5=21+2
a:5=23
a=23x5
a=115

Answer 2

(a:5-2)*5+2=107 (a:5-2)*5=107-2 (a:5-2)*5=105 (a:5-2)=105:5 a:5-2=21 a:5=21+2 a:5=23 a=23*5 a=115 (115:5-2)*5+2= 21*5+2=107