Question

{[(27*X-79)*61-78]*15+340}/250=4ROG MULT REZOLVARE

Answer 1

{[(27·X-79)·61-78]·15+340}/250=4
[(27·X-79)·61-78]·15+340=4·250
[(27·X-79)·61-78]·15+340=1000
[(27·X-79)·61-78]·15=1000-340
[(27·X-79)·61-78]·15=660
(27·X-79)·61-78=660:15
(27·X-79)·61-78=44
(27·X-79)·61=44+78
(27·X-79)·61=122
27·X-79=122:61
27·X-79=2
27·X=2+79
27·X=81
x=81:27
x=3