To find the missing exponent in the expression ( 43422x ), we can assume it is in the form ( a \cdot x^n ) where ( a ) is a coefficient and ( n ) is an exponent. Since no additional context or equivalent expression is provided, we can only state that the expression itself has ( x ) raised to the power of 1 (i.e., ( n = 1 )). Therefore, ( 43422x ) is equivalent to ( 43422x^1 ).