Posted by **teg1901** on Thursday, October 21, 2010 at 9:56am.

How do you do this Simultaneous Equation?

3x+4y=14

x+y=3

Please give me the step by step solution.

Thanks a lot!

- Math -
**Jen**, Thursday, October 21, 2010 at 10:13am
3x+4y=14 (1)

x+y=3 (2)

Multiply (2) by -3 to get the x's to cancel.

3x+4y=14 (1)

-3x-3y=-9 (3)

Add (1) and (3) together.

y=5

Replace y=5 in either original equation (1) or (2) to solve for x.

- Math -
**teg1901**, Thursday, October 21, 2010 at 12:27pm
Now, I understand. Thanks, Jen!

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