Question

{[(2•a+3)•2•3]•2+3}•2+3=85 ajutați-mă va rog

Answer 1

{[(2a+3)*6]*2+3}*2=85-3=82
[(2a+3)*6]*2+3=82:2=41
[(2a+3)*6]*2=41-3=38
(2a+3)*6=38:2=19
2a+3=19/6
2a=19/6-3=19/6-18/6=1/6
a=1/6:2=1/6*1/2=1/12