Question

solve by substiution method 2y+x= -15 ; x=3y​

Answer 1

Answer:

hope it helps you see the attachment for further information....

Answer 2

Given equation,

$2y+x=-15\\x=3y$

Substituting, x = 3y, in the first eq, we get,

$2y + x = -15\\2y+3y=-15\\5y=-15\\\\\boxed{\boxed{\bold{y=-3}}}}$

$\boxed{\boxed{\bold{x = -9}}}}$