9x + 5y = 28 5x + 9y = 56 The solution set for the system of equations is . NextReset

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04-04-2017
Mathematics

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9x + 5y = 28 5x + 9y = 56 The solution set for the system of equations is . NextReset

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irspow irspow · Answer 1 · 2017-04-04T17:25:08+02:00

irspow irspow

04-04-2017

5(9x+5y=28)-9(5x+9y=56)=0

(45x+25y=140)-(45x+81y=504)=0

45x+25y-45x-81y=-364

-56y=-364

y=6.5, now use either original equation to solve for x...

9x+5(6.5)=28

9x+32.5=28

9x=-4.5

x=-0.5

So the single solution (x,y) is (-0.5, 6.5)

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tbabii tbabii · Answer 2 · 2017-04-04T17:27:32+02:00

tbabii tbabii

04-04-2017

The solution set would be (-0.5,6.5). Make sure to put the negative first since it is the smaller number.

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