Question

1)a•8-a a•7 2)9•k k•8-k 3)6•i i•8 надо поставить ><= 1)k•1=k 2)1•a=a 3)u•0=0 надо было дописать равенства

Answer 1

8*а-а=7*a  (так как  а(8-1)=а*7
9*k>k*8-k    (  k*(8-1)=7*k)
6*i<i*8   (  6<8)

k*1=k
k=k:1
k=k

1*a=a
a=a:1   (1=a:a)
a=a      (1=1)

Answer 2

1. a•8 - a <= a•7 (distribute the multiplication) 8a - a <= 7a (combine like terms) 7a <= 8a (subtract a from both sides) a >= 0 (divide by a, note that a cannot be negative because then the inequality would be reversed)

2. 9•k <= k•8 - k (distribute the multiplication) 9k <= 8k - k (combine like terms) 9k <= 7k (subtract k from both sides) k <= 0 (divide by 7, note that k cannot be positive because then the inequality would be reversed)

3. 6•i <= i•8 (distribute the multiplication) 6i <= 8i (subtract 6i from both sides) 0 <= 2i (subtract 2i from both sides) 0 <= i (divide by 2)

To add the missing equations:

1. k•1 = k (multiplying by 1 leaves the value unchanged)
2. 1•a = a (multiplying by 1 leaves the value unchanged)
3. u•0 = 0 (anything multiplied by 0 equals 0)