Answer:
k=-5
Step-by-step explanation:
-12=4.7k+11.5
switch sides - 4.7k+11.5=-12
multiply both sides by 10 - 4.7k times 10 +11.5 times 10=-12 times 10
refine - 47k+115=-120
subtract 115 from both sides - 47k+115-115=-120-115
simplify it - 47k=-235
divide both sides by 47 - 47k/ 47= -235/ 47
simplify - k =-5
