Answer:
k=1
Step-by-step explanation:
-2k+10=64k-56
66=66k
k=1

The coefficients are:-
-4,-6
<h2>hope it would be helpful for you</h2>
3/4 + 5/16
=12/16 +5/16
=17/16
=1 1/16
450/500 how much you have to how much it costs
this equals to 90 % of the complete cost
100%-90%=10%
you need a 10 % discount
hope this helps