Question

resuelve cada. sistema de ecuaciones npor la regla de cramer
(×_5y=8. _7×+8y=25

Answer 1

$\left[\begin{array}{ccc}1&-5&\\-7&8&\\\end{array}\right] (1)(8)-(-7)(-5)=8-35=-27 para x= \left[\begin{array}{ccc}8&-5&\\25&8&\\\end{array}\right] (8)(8)-(-5)(25)=189/-27=-7 y= \left[\begin{array}{ccc}-5&8&\\8&25&\\\end{array}\right] (-5)(25)-(8)(8)=-125-64=-189/-27=7 x= -7 y= 7$