Question

10x-5y=-20
7x-5y=-26

Answer 1

I know the answer hold on...

Answer 2

(2,8) That is the answer!:)

Answer 3

Try and use substitution. Here is an example: The substitution method is a method that is based off a rule of algebra. Basically, it's similar to using a formula. You substitute values into the formula. The same thing applies here.

Let's say we have the following system:

y = 2x + 3
5x + 2y = 24

Before we turn over to elimination, let's try using our new friend substitution. It clearly says that y is equal to 2x + 3. This means that we can substitute 2x + 3 in for y.

5x + 2y = 24
5x + 2(2x + 3) = 24
5x + 4x + 6 = 24

Now that we have eliminated a variable, we can solve the system.

9x + 6 = 24
9x = 18
x = 2

Now let's plug this back into one of the equations. I prefer to plug it into the equation that has a variable isolated.

y = 2x + 3
y = 2(2) + 3
y = 4 + 3
y = 7
Therefore, the solution set is (x, y) = (2, 7).

Answer 4

No it's not it's (2,8)

Answer 5

See if you understand substitution, and try and use it on your own equations :)

Answer 6

You copied and pasted that im not dumb

Answer 7

From another person

Answer 8

You can't type that fast

Answer 9

OOOHHHHHH the suspense

Answer 10

Super fast typer!

Answer 11

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Answer 12

But it doesnt matter, it's all about making him understand how to use the substitution method.

Answer 13

It taes so long just to get to the point!

Answer 14

*takes

Answer 15

But he needs to learn it first, you can't learn something new in 2 seconds.

Answer 16

only if its 15 seconds than yeah

Answer 17

BYE COPYING AND PASTING? SHEESH

Answer 18

YOUR THE ONE THAT'S NOT GOING TO LEARN

Answer 19

? It doesnt matter where I found the text, if it helps him learn.

Answer 20

I dont need to learn anything from this post, I am not the one who asked it.

Answer 21

bye