Question

Answer the question no. 18

Answer 1

Here, ax + 3y = 25
Now, It is given, y =1, so
ax + 3(1) = 25
ax = 25 - 3
x = 22/a

In short, Your Answer would be 22 / a

Hope this helps!

Answer 2

x = 22 / a ( where a is calculated in a point above?) :)