#matematika wajib kls 10

a.f (x)=10-3x
=>f (2)=10-3.2
=> =10-6=4

f (x)=10-3x
f (-2)=10-3.-2
=> =10+6=16

b.f (x)=10-3x=-5
=> -3x=-5-10
=> -3x=-15
=> x=-15/-3
=> x=5
maaf kalau salah