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# maths homework- algebra watch

1. I'm doing some maths homework and because my teacher is just one of this who talks really quickly and moves too fast in lessons, I have no idea what I'm doing and would really,really appreciate it,if somebody could help me. I know the photo is backward but this is the best i could do.
2. (Original post by jesst15)
I'm doing some maths homework and because my teacher is just one of this who talks really quickly and moves too fast in lessons, I have no idea what I'm doing and would really,really appreciate it,if somebody could help me. I know the photo is backward but this is the best i could do.
Simultaneous equations are such that If there are solutions then they are a fixed set of numbers.

So in your first one for example if you rearrange to make y the subject of one, you can substitute it into the other because [b]in both equations the value of X and y are the same and the goal of solving both is to find these common values of X and y.
3. (Original post by jesst15)
I'm doing some maths homework and because my teacher is just one of this who talks really quickly and moves too fast in lessons, I have no idea what I'm doing and would really,really appreciate it,if somebody could help me. I know the photo is backward but this is the best i could do.
Learn the rule for this.
4. (Original post by jesst15)
I'm doing some maths homework and because my teacher is just one......
Get Y or X the subject of the equation (Y= or X=), also dont forget to put the answer of e.g. X back into equation to get Y. so for example for first equation,
2x-y=1
-y=1-2x
y=2x-1
Then put this into the other equation:
2x+(2x-1)=10
Go from here

Or with the one bottom left minus (and plus on top left) them to cancel out
(12x+20y)-(12x+9y)=28-6
11y=22
Go from here

Bottom Right
Change Y to 2x in top equation
x(y)=17
x(2x) =18
Go from here

Hope this helps you get started
5. (Original post by jesst15)
I'm doing some maths homework and because my teacher is just one of this who talks really quickly and moves too fast in lessons, I have no idea what I'm doing and would really,really appreciate it,if somebody could help me. I know the photo is backward but this is the best i could do.
It would be better for you to search this on YouTube so you will get an explanation and instructions.
6. (Original post by DivingHaywood)
Get Y or X the subject of the equation (Y= or X=), also dont forget to put the answer of e.g. X back into equation to get Y. so for example for first equation,
2x-y=1
-y=1-2x
y=2x-1
Then put this into the other equation:
2x+(2x-1)=10
Go from here

Or with the one bottom left minus (and plus on top left) them to cancel out
(12x+20y)-(12x+9y)=28-6
11y=22
Go from here

Bottom Right
Change Y to 2x in top equation
x(y)=17
x(2x) =18
Go from here

Hope this helps you get started

Yes it did,thank you so much!!!

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