hi, i am doing a electronic engineering course and have come up with the simultaneous equations thati need to answer. any help on it? many thanks. liam

10x - 10 + 20y - 20 = 0

+20-20y+40(y-x)= 0

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- May 20th 2008, 11:21 AMdjstarsimultaneous equations
hi, i am doing a electronic engineering course and have come up with the simultaneous equations thati need to answer. any help on it? many thanks. liam

10x - 10 + 20y - 20 = 0

+20-20y+40(y-x)= 0 - May 20th 2008, 11:31 AMMoo
- May 20th 2008, 11:32 AMmathceleb
Simplifying your 2 equations, you get:

From here, I know 3 ways to solve. For the elimination method, go here:

2 Unknowns by Elimination Calculator

Enter those 2 equations and press the solve button.

I get (x,y) = (1,1) Plugging those back into the original equations, those work.

You could also use the substitution method here:

2 Unknowns by Substitution Calculator

or Cramer's method here:

2 Unknown Cramer's Method Calculator

Let me know if you have questions.