Answer:
k=-1
Step-by-step explanation:
13=-4k+9
switch sides
-4k+9=13
subtract 9 from both sides
-4k+9-9=13-9
simplify
-4k=4
divide both sides by negative 4
-4k/-4=4/-4
hope this helps :) have a nice day !!
13 = -4k + 9
Flip the equation
−4k + 9 = 13
Subtract 9 from both sides
−4k + 9 − 9 = 13 − 9
−4k = 4
Divide both sides by -4
−4k / -4 = 4 / -4
Simplify
k = -1
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