How do you solve -LSB- math -RSB- \ int _ -LCB- - \ infty -RCB- ^ -LCB- \ infty -RCB- \ exp -LRB- - a | t | -RRB- \ exp -LRB- - a | t - \ tau | -RRB- \ , dt -LSB- / math -RSB- ?
If 6x43-46y9 = 1904 , what is the value of x ?