luticiawright luticiawright

16-02-2017
Mathematics

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x + 2y = 5
3x + 5y = 14
Solve the system of equations.

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texaschic101 texaschic101

16-02-2017

x + 2y = 5....multiply by -3
3x + 5y = 14
----------------
-3x - 6y = -15 (result of multiplying by -3)
3x + 5y = 14
----------------add
-y = -1
y = 1

x + 2y = 5
x + 2(1) = 5
x + 2 = 5
x = 5 - 2
x = 3

solution is (3,1)

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