Answer:

Step-by-step explanation:
let me know if this is right please :(
Let the required no. be x then according to question
(84/100)*x = 21
x = 21*(100/84)
x = 2100/84
x = 25
hence the required no. is 25
hope it helped
Answer:
28x^2= y
x = jamal age
y= jamal's uncle age
Step-by-step explanation: