Answer:
eqn 1. ( k + a = 500 )
Step-by-step explanation:
In eqn. 1 , both 'k' & 'a' have co-efficient as 1. But in eqn. 2 , 'k' has co-efficient as 3 & 'a' has co-efficient as 10.
-1+5(6-y)=
=-1+5*6+5*(-y)=
=-1+30-5y=
=29-5y
28
His aces on 80 serve = 35% of 80
= 35/100 × 80
= 28
80