Respuesta :
Answer:
-5=x
Step-by-step explanation:
f(x)=9-2x when f(x)=19
19=9-2x
Subtract 9 from both sides
10= -2x
Divide both sides by -2 to isolate the variable
-5=x
Answer:
-5=x
Step-by-step explanation:
f(x)=9-2x when f(x)=19
19=9-2x
Subtract 9 from both sides
10= -2x
Divide both sides by -2 to isolate the variable
-5=x