# How do u work this out?Watch

#1
Make x the subject of the formula
Y =x-a
0
1 week ago
#2
(Original post by ????????????!!!!)
Make x the subject of the formula
Y =x-a
Y+a=x

(Add an 'a' both sides of the equals sign. You add an 'a' to '-a' and it cancels out, so there's no 'a' on the side with the x anymore. Whatever you do one side of the equals sign, you must also do on the other side of the equals sign. So then you add 'a' to 'y'.)
0
#3
Thx
0
1 week ago
#4
I also flip it round to have the wanted term on the left. Makes it easier when you need to do this then solve an equation with it after.

So X=Y a
Last edited by Bio 7; 1 week ago
1
1 week ago
#5
yeah, put the X on the left-hand side! A subject is on the left-side.
0
X

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