Identify the value for the variable.
 What is the value of x in this simplified expression?
 7-9 · 7-3 = 7x
 x = 
 What is the value of y in this simplified expression?
 StartFraction 11 Superscript negative 4 Baseline Over 11 Superscript negative 8 Baseline EndFraction = 11 Superscript y
 y =