help me with systems of equations addition/elimination method problem

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heres the problem: 0.4x+0.4y=-18

-0.8x+-0.8y=-36

Oct 26th, 2015

Thank you for the opportunity to help you with your question!

We have the equation as

.4x+.4y=-18 ...eqn(1)

-.8x+-.8y=-36 ...eqn(2)

2*eqn(!)+eqn(2),eliminate y

2*.4x-.8x =2*-18-36

.8x-.8x=-36-36

0=-72(cannot be true)

As it is not valid therefore,the system has no solution.

Thus no solution exist for this system.(answer)


Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 26th, 2015

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