solve the eqaution -12+5k=15-4k
Simple....you have:-12+5k=15-4kisolate the variable...-12+5k=15-4k+12 +125k=27-4k5k=27-4k+4k +4k9k=27k=3Thus, your answer.
-12+5k=15-4k=> -12 - 15 = -4k - 5k => -27 = -9k=> -9k = -27 => k = -27/-9=> k = 3Hope it helps !!!