Sarah251990 Sarah251990

30-06-2017
Mathematics

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X+3y=5
2x-3y=-8
Substitution method

Respuesta :

30-06-2017

x+3y=5 x = -3y + 5
2x-3y=-8

2(-3y + 5) - 3y = -8
-6y +10 - 3y = -8
-9y + 10 = -8
-9y = -18
y = 2

x + 3(3) = 5
x + 9 = 5
x = -4

(-4, 2)

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