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a).  x-4=13

13+4=17

x=17

b). 7y=35

35/7=5

y=5

c). 3w-9=27

3w=27+9

3w=36

w=36/3

w=12

I will run through an example of how to solve a set of simultaneous equations. In simultaneous equations you are given two or more algebraic equations and you need to solve them for the variables, usually...

When dividing fractions you must remember the KEEP, CHANGE, FLIP rule.

KEEP - The first fraction you KEEP as it is, you don't change it.

CHANGE - You now change the sign from a division to a...

24.50/7 = £3.50 - price of 1 ticket 

63/3.50 = 18 - number of tickets bought total 

18 - 7 = 11 

Lets take this as an example:

Simplify 5a - (2a + 6)

To 'simplify an equation' means to put it at its most basic form

To make it easier for us, we can place a 1 infront of the bracket...