-12+5K=15-4k

Question

solve each equation 

I get 3 as answer but the right answer is 27

Answer 1

I think it is better to go through the steps of solving it:

 

Problem: -12 + 5k = 15 + 4k

 

Step 1: Bring all expressions with the unknown k on one side: 5k - 4k = 15 + 12

 

Step 2: Add together expressions on each side:                          1k   =    27        

 

Step 3: Divide the 27 by the factor of k which is 1:                       k    = 27/1 = 1  => k = 27

 

Step 4: Verify your answer by replacing k with 27:         5k - 4k = 15 + 12

                                                                         5(27) - 4(27) = 15 + 12

                                                                            135 - 108   = 15 + 12

                                                                                   27      =      27     Good!!

Answer 2

Rakhee I think the book might have printed the question wrongly or you might have copied it wrongly

 

For 27 to be the answer the question shud have been :  -12 + 5k = 15 + 4k

 

then , k=27

Answer 3

The "right answer" of 27 is actually incorrect, since plugging in (your) correct answer of 3 satisfies the equation. Q.E.D.