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Find the solution of this system of linear equations. Separate the x- and y-values with a comma 10x + 15y = 20 -9x - 15y = -21

Respuesta :

First Equation,

10x + 15y = 20

Second Equation,

- 9x - 15y = - 21

First Equation + Second Equation,

10x + 15y -9x -15y = 20 - 21

x = -1

Substituting value of x in First Equation,

10(-1) + 15y = 20

-10 + 15y = 20

15y = 30

y = 2

Hence, the solution is (-1, 2)

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