Need help with subsituition

I'm happy to help. Show me some examples that you need help with.

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Here is an example

x+2y=13 y=2x+5

plug y = 2x + 5 into the first equation

x + 2(2x+5) = 13

x + 4x + 10 = 13

5x = 3

x = 3/5

Okay I understand the first part now! :)

But what would you do for the second one.....

That was it. You use the second equation to solve for both. x = 3/5 is the solution for both

Thank you for your help Mr.Vincent :)

You're most welcome :)

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