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20-04-2020
Mathematics

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11) Solve the system by the elimination method. Check the solution.

x + 5y = 25
3x + 4y = 20

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20-04-2020

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20-04-2020

-3 • x + 5y = 25
1 • 3x + 4y = 20

-3x -15y = -75
3x + 4y = 20

-11y = -50

divide both by -11y

which will equal y = 5

then you’ll do
x + 5(5) = 25
x + 25 = 25

subtract the 25’s

so x = 0

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