ok, so you have problems solving the simultaneous equations? am i to assume that you got the process then? as in, you understand how i formed the two equations

There are two mainstream methods to solve systems of equations (there are more than two ways, but these two get used more often), Elimination, and Substitution.

I will do Elimination, it is your responsibility to look up the rest when you have time.

The objective of Elimination, as its name suggests, is to eliminate on variable by adding (or subtracting) one equation from the other. Of course for this to work, the variable you want to eliminate has to have the same coefficient in both equations. To get that to happen, you may have to multiply one (or both equations) by something. Let's see how this works.

................(1)

..................(2)

Let's eliminate y. To do this i must multiply equation two by 3 (or -3 if you prefer). we get:

....................(1)

.....................(3) = (2)*3

Now we have 3y in both equations, we can therefore, subtract one from the other, and the y's will go away. we obtain:

.................(3) - (1)

Now we solve for x, we get

Now we plug in that value for x into either of the original equations to find y