if ( - 4 ) ^ ( 6 x ) = 4 ^ ( 30 + x ) and x is an integer , what is the value of x ?
"since x is an integer , ( - 4 ) ^ ( 6 x ) is always positive . so , 4 ^ 6 x = 4 ^ ( 30 + x ) 6 x = 30 + x 5 x = 30 x = 6 answer : e"
divide(30, 4)