Solve each system by using substitution. 3x - y = 4 x + 5y = -4

Mathematics

1 answer:

babunello [35]3 years ago

5 0

Answer:

$from \: last \: equation : \\ x = - 4 - 5y - - - (a) \\ substitute \: in \: first \: equation \\ 3( - 4 - 5y) - y = 4 \\ - 12 - 15y - y = 4 \\ - 16y = 16 \\ y = - 1 \\ \\ therefore \: from \: (a) \\ x = - 4 - 5( - 1) \\ x = 1$

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