Question

3x+y=12
x-5y=4




Ajuda pfv

Answer 1

\left \{ {{3x+y=12} \atop {x-5y=4}} \right.

y = 12-3x

x-5(12-3x)=4

x-60+15x=4

16x=64

x=4

y=12-3x

y-12-3.4

y=12-12

y=0