Let's look at a "complex" simultaneous equations maths problem, and its way of solving (suggested).

Question:

---- (A)

--- (B)

Solve for y and x.

How do you go about it?

Look scary, right?

But like what I said, looks can be deceiving. Use the brain to go around the issue!

Tips: The structure of the simultaneous equations looks similar to the conventional type.

(Conventional type:-

Ax + By = nn

Cx + Dy = kk )

So what we have to do can be to simply substitute by

**m**, and by

**h**(or any variable name).

What we thus convert to is:

---- (A)

--- (B)

Will this simultaneous equations be more comfortable to solve?

Hence, a simple twist to the former mathematical questions can result in a totally familiar situations where we have solve many a times.

Thus, the technique and usefulness of substitution cannot be under-estimated.

It can be powerful at times to reveal a beautiful mathematical expression for user to resolve.

Maths Is Interesting!

Treasure our brain and our thinking.

:-)