Question

rezollvarea ecuatiei {[(2x+3)*2+3]*2+3}*2+3=85

Answer 1

{[(2x+3)*2+3]*2+3}*2=85-3
{[(2x+3)*2+3]*2+3}*2=82
[(2x+3)*2+3]*2+3=82:2
[(2x+3)*2+3]*2+3=41
[(2x+3)*2+3]*2=41-3
[(2x+3)*2+3]*2=38
(2x+3)*2+3=38:2
(2x+3)*2+3=19
(2x+3)*2=19-3
(2x+3)*2=16
2x+3=16:2
2x+3=8
2x=8-3
2x=5
x=5:2
x=2,5
sper ca e bine