Answer:
x = -21
Step-by-step explanation:
k(x)=1/3(x+9) and k(x)=-4
Set them equal
1/3(x+9) =-4
Multiply each side by 3
3*1/3(x+9) =-4*3
x+9 = -12
Subtract 9 from each side
x+9-9 = -12-9
x = -21
Answer:
x = -21
Step-by-step explanation:
if k(x) = -4 you can substitute that into the original equation:
-4=1/3(x+9)
multiply both sides of the equation by 3
-12=x+9
subtract 9 from each side
-21=x
