how do you equate this problem?

25+x+x=5+3x+x

2x-3x-x=5-25

-2x=-20

x=20/2

x=10

son is 10 years old and father is 35 years old.

X = father age

Y = son age

(1) : X = Y + 25 (Mr. Reyes is 25 yrs. older than his son)

(2) : X = 3Y + 5 (Mr. Reyes is 5 more than thrice as old as his son)

doing (2) - (1) :

X - X = 3Y - Y +5 - 25

0 = 2Y -20

Y = 10

and X = Y + 25 = 35

father is 35 years old

Son is 10 years old

You can make two equations between the ages of Father (F) and Son (S)

F = S +25

F = 3S +5

S +25 = 3S + 5

2S = 20

S = 10

F = 35

say

let us,mr.reyes's age s 'y'

let us,his sonn's age s 'x'

1)y=x+25: (as per ur que,)

2)y=3x+5" (as per ur que,)

(2) - (1):

0=2x-20

so,

x=10:

sub, x val in (1):

y=25+10:

y=35:

so,

Mr.reses's age s 35:

his son's age s 10:

hope i'm crct.

nix