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Mathematics
Madeline
4 January, 12:36
K (x) = 1/3 (x+9) and k (x) = -4, so x=?
+1
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Adrienne Mcguire
4 January, 13:52
0
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
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Pranav Orozco
4 January, 15:52
0
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
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