A number x is 4 less than three times another number y. If their sum is increased by 5, the result is 25. Find both the numbers

Let the first number be x
Let the second number be y

According to given condition

y= 3x-4
Also given that if sum is increased by 5 then result is 25

So the equation can be written as

x + y +5 = 25

Substituting the value of y we get
x + 3x – 5 + 5 = 25
=> 4x+1 = 25
=> 4x = 24
=> x = 6
Hence first number is 6

Second Number = y= 3 (6) -4 = 14

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