x=-2 output=12 x=1 output =9 x=4 output =6 help me solve

Answer 1

x1= -2
x2=x1+3= -2+3=1
x3=x2+3=1+3=4

output1=12
output2=output1-3=12-3=9
output3=output2-3=9-3=6

x(n+1)=x(n)+3

output(n+1)=output(n)-3