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        K is the variable.
 
 5k + 18 = -7
 -18    -18      [add negative plus a negative]
 
 \5k = -25/          [negative divided by a positive = a negative]
 5               5
 ___________
 k = -5
 
 **to check your answer place the -5 where the variable k is. Let's do it together.
 
 5(-5)+ 18 =-7    [remember your order of operations.
 1.) parenthesis
 2.) exponents
 3.) mulitiply
 4.) divide
 5.) add
 6.) subtract
 **to remember: the first letter in each word is
 PEMDAS <that's how I remember.
 
 -25 + 18 = -7      [-25 + 18 = -7]
 
 -7 = -7
 
 Now you know you're correct!
 
 Hope this helped!
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