SOLUTION: How would you do Subsituion method for 4x=720-3y and 5y=12x?

Question 314969: How would you do Subsituion method for 4x=720-3y and 5y=12x?
Found 3 solutions by Fombitz, malaydassharma, solver91311:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
1.
2.
Multiply eq. 1 by 3,

Substitute this into eq. 2 directly,

Then from eq. 2,

Answer by malaydassharma(59)   (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: Linear System solver (using determinant)

Solve:

Any system of equations:

has solution

or

(x=64.2857142857143, y=154.285714285714}

Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!

I would divide both sides of the second equation by 5 and substitute the resulting expression in x for y in the first equation.

Something like this:

And then I would solve for . As soon as I had a value for I would substitute that back into either of the original equations so that I could solve for . But then again, that's just me. Someone else might do it differently. There are several other valid ways.

John

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