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26-02-2021
Mathematics

contestada

Solve the following by substitution
2x - 3y = -6
-5x - 9y = 15

Respuesta :

Yang100 Yang100

26-02-2021

Answer:

x=-3, y=0. (-3, 0).

Step-by-step explanation:

2x-3y=-6

-5x-9y=15

---------------

-3(2x-3y)=-3(-6)

-5x-9y=15

----------------------

-6x+9y=18

-5x-9y=15

--------------

-11x=33

x=33/-11=-3

2(-3)-3y=-6

-6-3y=-6

3y=-6-(-6)

3y=-6+6

3y=0

y=0/3=0

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