Question

Помогите пожалуйста ​

Answer 1

k=15/(-0,5)=-30

m=9-(-30) = 39

k=-30

m=39

Answer 2

$\left \{ {{-0,5k=15} \atop {k+m=9}} \right.$

$\left \{ {{k=15:(-0,5)} \atop {k+m=9}} \right.$

$\left \{ {{k=-30 } \atop {k+m=9}} \right.$

$\left \{ {{k=-30 } \atop {-30+m=9}} \right.$

$\left \{ {{k=-30 } \atop {m=30+9}} \right.$

$\left \{ {{k=-30 } \atop {m=39}} \right.$