Answer:
x=17
Step-by-step explanation:
This question is just like substitution,that is a number will be given to substitute a letter...
Ok let's start with the question
(y+5)+3y=x
And we are to determine the value of x when y is 3...
That means we will replace any where we see y with 3
(3+5)+3(3)=x
8+9=x
x=17
Therefore when y is 3,x is 17
Our final answer is 17
