What we learnt about Substitution
Basically Substitution is putting numbers into letters and using more than one letters.
Easy Example for substitution=
2X= lets say that X is 3
so 2 x 3 is 6 so the answer is 6
Another Example using more than 1 letter=
4X + 2Y ( Y=1) ( X=2)
4 x 2 + 2 x 1
8+2=
10
There are a lot of different ways of doing substitution sometimes you can get confused but i really think that it is a really cool thing to learn in maths its quiet fun.
Te Akau.
