(4000:10*8):(5600*3:84)+65*12:60=49-4x
Чему равен x?

(4000:10*8)    :     (5600*3:84)  +    65*12:60    = 49-4x3200                            200                 133200:200+13=49-4х16+13=49-4х29=49-4х4х+29=494х=49-294х=20х=5