60x90-50x[84-[45-(7.x-9):2]}-10=2440 5400-50×[84-[45-(7x-9):2]}=2440+10
-50×[84-[45-(7x-9):2]}=2150-5400
[84-[45-(7x-9):2]}=-3250/50
-[45-(7x-9):2]=-65-84
-45+(7x-9):2=-149
(7x-9):2=-104
7x-9=-104×(-2)
7x-9=208
7x=208+9
7x=217
x=217/7
x=31
Sper că te-am ajutat, coroniță?
