Subtract 3 from each side
y - 3 = 2x
Divide through by 2
y/2 - 3/2 = x
or x = y/2 - 3/2
Now simply switch labels: x↔y
y = x/2 - 3/2
Yes, the equation “N2 + 3H2 = 2NH3” is balanced.
It would be -4. subtracting a positive is the same as adding a negative
-18= you owe 18 dollars
18= you earned 18 dollars
0= you owe nothing/you earned nothing
