[nicmike04]

Thank you for answering my question, but it really did not help I will give you an example of the problem that I have

x+2y=1
3x-y=10

I cannot figure out how to solve this at all. I have used all of the Google search engines to try to figure it out and it is not helping..

Someone please help me!

Thank you,
Nicole

[Unknown008]

Substitution is a method where you have to 'replace' one variable into an equation so that only one variable is left. So, in your question;

x+2y=1
3x-y=10

There are numerous ways to solve this problem with substitution. Let's do the simplest.

x+2y=1

Make x subject of formula,

x = 1-2y

Now, you, in a way, 'know' what x is. Since you 'know', plug it in your second equation!

3(1-2y)-y=10

You see? I replaced 'x' by its equal equation, that is '1-2y'. Now, you can solve the equation, find 'y' and solve for x using the first equation!

Hope it helped you, post back if you need more explanation:). However I think I was clear enough.

[mariarosamaripo]

2x-3=-y
3x+5y=2

[mariarosamaripo]

I need help with substitution
:confused:

[Unknown008]

Next time Maria, start a new thread for your question.

Substitution is a simple way to solve equations. You only need to choose a variable, and replace it in the other equation.

For example, make 'y' in 2x-3=-y, the subject of that formula.

Post back, then we'll go on.

[juhi2011]

3(1-2y)-y=10
the equation becomes a linear equation, use your brain in the same direction to get the answer, I hope this will help you