Question

Afla numărul necunoscut (3*y+5)*3+5=87:3

Answer 1

(3*y+5)*3+5=87:3
(3*y+5)*3+5=29
(3*y+5)*3=29-5=24
(3*y+5)=24/3=8
3*y=8-5=3
y=3/3=1

Answer 2

(3*y +5) *3+5=87:3
9y+15 +5=29 (L-am distribuit pe 3)
9y+20=29/-20
9y=9/:9
y=1