How do you solve -8k=-5k+9

2 answers:

7 0

You add +5k to both sides to eliminate-5k, leaving you with -3k=9 { since you added 5k to both sides } . then you divide both -3k on both sides { to isolate k }, leaving you with k = -3 as your answer.

Zolol [24]3 years ago

5 0

Answer:

k = -3

Step-by-step explanation:

This one is quite easy once you know how to achive this:

What you want to to is first add 5k to both sides

-8k + 5k = -5k + 5k + 9

This eliminates the 5k leaving

-3k = 9

And since you can't have a negative exponent, times both sides by -1

-3k x -1 = 9 x -1

3k = -9

Now divide both sides by 3 to get the answer

3k/3 = -9/3

k = -3

and thats the answer.

Hope this helps and have a great day!

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$2x+12=\frac{1}{3}*\frac{7x}{3}+\frac{1}{3}*\frac{4}{3}\\\\2x+12=\frac{7x}{9}+\frac{4}{9}\\\\2x-\frac{7x}{9}=\frac{4}{9}-12\\\\\frac{2x*9}{1*9}-\frac{7x}{9}=\frac{4}{9}-\frac{12*9}{1*9}\\\\\frac{18x}{9}-\frac{7x}{9}=\frac{4}{9}-\frac{108}{9}\\\\\frac{18x-7x}{9}=\frac{4-108}{9}\\\\\frac{11x}{9}=\frac{-104}{9}\\\\\\x=\frac{-104*9}{11*9}=\frac{-104}{11}=-9\frac{5}{11}$