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

User Moaaz Bhnas
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2 Answers

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


User Tourki
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