Question

7x-15y=1
- x-6y=8
con metodo de suma y resta
con su sustitucion de ecuacion y comprobacion

Answer 1

Respuesta:

X = -2

Y = -1

Explicación paso a paso:

$Sistema/Metodo/Suma/Resta\\7x-15y=1\\-x-6y=8\\\\(-2)(7x - 15y) = (-2)(1)\\(5)(-x - 6y) = (5)(8)\\\\-14x + 30y = -2\\-5x - 30 = 40\\---------\\-19x + 0 = 38\\\\x = \frac{38}{-19}\\\\x = -2\\Valor/Y\\7(-2) - 15y = 1\\\\-14 - 15y = 1\\\\-15y = 1 + 14\\\\-15y = 15\\\\y = \frac{15}{-15}\\\\y = -1\\Comprobacion\\Primera/ecuacion\\7(-2) - 15(-1) = 1\\\\-14 + 15 = 1\\\\1 = 1\\Segunda/ecuacion\\\\-(-2) - 6(-1) = 8\\\\2 + 6 = 8\\\\8 = 8$