WHY is the equation done like this?
Example: 4d-4=5d-8
The first thing you're suppose to do is subtract 5d from both sides, but why 5d instead of 4d? Why do we know to do 5d?
2 answers
The equation is done this way because it is the most efficient way to solve the equation. By subtracting 5d from both sides, you are able to eliminate the d variable from the equation, leaving only the constants 4 and 8. This makes it easier to solve the equation, as you can then subtract 4 from both sides to get the answer.
subtracting 4d will also work
4d-4=5d-8
-4 = d-8
but most people like to have the variable on the left. Doesn't really matter.
4d-4=5d-8
-4 = d-8
but most people like to have the variable on the left. Doesn't really matter.