# Answer for Q.1 S.E

S.E is simultan... its really hard to spell!

HideShow resource information

- Created by: Lamise Hassan
- Created on: 05-06-11 18:06

First 93 words of the document:

X= 9 + y (move the y on the other side; it turns positive)

So now substitute that into the first equation

(9 + y) + y = 15

So 9 + 2y + 15

2y = 6 (15-9)

y=3

So lets put that back in one of the equations :

x- 3 = 9

x = 12 ( 9 + 3)

So finally lets see if that works for the other equation

12(x) + 3 (y) = 15

Yaay it works!

So we've done it by substitution, we have to find a equation for x or y to put

into the equation :P

## Comments

No comments have yet been made