Question

Solve for x and y −/ − +/ = −−/ − +/ and +/ + −/ = − − (+)/7​

Answer 1

Answer:

( 8, - 15 )

Step-by-step explanation:

$\left \{ {{x+y=-7} \atop {280x+171y=-325}} \right.$

x + y = - 7 ⇒ y = - x - 7

280x + 171y = - 325

280x - 171x - 1197 = - 325

109x = 1197 - 325

109x = 872

x = 8

y = - 8 - 7 = - 15

( 8, - 15 )