2x + x = 63
3x = 63
x = 21
2x = 43
Jiri is 21
Let, the number = x
It would be: 13 + 2x + 7 = 6x
2x+20 = 6x
6x-2x = 20
4x = 20
x = 20/4
x = 5
In short, Your Answer would be 5
Hope this helps!
Answer:
Step-by-step explanation:
Given that

Right side has values as
53, 53+77, 53+2(77),+....
We have to find one which is a perfect square.
We have from this series 361 is 19 square
Thus 
Next is 
and so on.
The second option, 7 rolls of quarters and 4 rolls of dimes.
7*10=70
4*5=20
70+20=90