Answer:
[tex]f(-7) = 20[/tex]
Step-by-step explanation:
Given:
[tex]f(x) = 2(3 -x)[/tex]
Solving for [tex]f(-7)[/tex]:
[tex]f(-7) = 2(3 -(-7)) \\ f(-7) = 2(3 +7) \\ f(-7) = 2(10) \\ f(-7) = 20[/tex]
