Answer:
7 ⁻²²
Step-by-step explanation:
7¹⁶/7¹² = 7⁻¹⁸/7ˣ
7⁽¹⁶⁻¹²⁾ = 7⁽⁻¹⁸⁻ˣ⁾
16 - 12 = - 18 - x
4 = - 18 - x
x = - 18 - 4
x = - 22
