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23-06-2016
Mathematics

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Solve:. x+2y=13. 4x+8y=-9. . A. (3,5). B. (-1,7). C. No solutions. D. Infinitely many solutions

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04-07-2016

To solve these equations, we rewrite one equation in terms of x and substitute it to the other.

First equation:
x+2y = 13
y = 13/2 - x/2

Second Equation:
4x+8y=-9

Substitute the first equation to the second equation:
4x + 8(13/2 - x/2) = -9

Solving the equation will cancel x. Therefore, the correct answer is C, no solutions.

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