Algebra Question

Algebra Level 1

Solve for X and Y.

3x - 5y = 6

2x + 4y = 2

x = ? y = ?

answer in interval notation example (x,y)

(4,4) (3,3) none of the above (2,2)

Thomas McDonnell by Thomas McDonnell , 24, USA

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1 solution

Theodore Sinclair
Apr 26, 2018

2 x + 4 y = 2 , x + 2 y = 1 , x = 1 − 2 y . 2x+4y=2, x+2y=1, x=1-2y.

3 ( 1 − 2 y ) − 5 y = 6 , 3 − 6 y − 5 y = 6 , − 11 y = 3 , y = − 3 11 3(1-2y)-5y=6, 3-6y-5y=6, -11y=3, y=-\frac{3}{11}

x = 1 − 2 ( − 3 11 x=1-2(-\frac{3}{11} ) = 1 6 11 =1 \frac{6}{11}

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This is not an interval notation, as there are no intervals of any kind involved. Please say something like "Report answer in a format (x, y)."

Marta Reece - 3 years, 1 month ago

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