teddygirl PLEASE HELP/ check answer The triangle below on the left has a perimeter of 14. The triangle on the right has a perimeter of 21. What are X and Y? I have this but idk if its right x + 2y = 14 3x + 5/2y = 21 6x + 5y = 42 -6(x + 2y = 14) 6x + 5y = 42 -6x - 12y = -84 6x + 5y = 42 ------------------------ -7y = --42 y = 6 If y = 6 then x = 2 <==ANSWER one year ago one year ago

1. TheViper

|dw:1339692621478:dw|

2. teddygirl

|dw:1339692696540:dw|

3. TheViper

|dw:1339692765055:dw| Is it like this?

4. ganeshie8

correct. x=6, y = 2

5. TheViper

If yes then;$\color{red}{x+2y=14.}$$\color{red}{3x+2(\frac{5}{4y})=21.}$

6. TheViper

then u r correct:)

7. teddygirl

one more question.. Is that method called substitution or elimination?

8. ganeshie8

its other way.. x=2, y=6.

9. ganeshie8

elimination

10. teddygirl

ok thanks!

11. TheViper

$\Huge{\color{red}{\text{U r welcome:)}}}$