guilhermegvalle guilhermegvalle

20-05-2021
Mathematics

contestada

Find the solution of the system of equations.
-7x - 3y = - 20

3x+ 6y = -15

Respuesta :

rijarafiquee rijarafiquee

20-05-2021

Answer:

x = 5 y = -5

Step-by-step explanation:

-7x - 3y = -20

-3y = 7x - 20

y = -7/3x + 20/3

3x + 6(-7/3x + 20/3) = -15

3x - 14x + 40 = -15

-11x = -55

x = 5

-7(5) - 3y = -20

-35 - 3y = -20

-3y = 15

y = -5

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