Ans:
1– $15n
2– a -> (m/5 + 3) years old . b ->11 years old
3– (24 + 9x) years old
4– a -> y³ cm³ , b -> 343 cm³
5– a -> (10 +a) cakes , b -> (750 + 95a) g
6– (12x – 18)
7– a -> (12d + 150) kg , b -> 70.62 kg
8– a -> (9f -24) years old , b -> 3 years old
9– a -> (3x + 172 / 5) marks , b -> 81.2 marks
10– a -> (5w + 40 /6) kg , b -. ( 10w +40 / 11) kg , c -> 33 : 25
11– a > 8n cm , b -> 3n² cm²
