Answer:
[tex]x=6[/tex]
[tex]y=-3[/tex]
Step-by-step explanation:
Substitute (-y + 3) for x in the first equation:
[tex]15(-y+3)+31y=-3[/tex]
Expand:
[tex]45-15y+31y=-3[/tex]
Simplify:
[tex]45+16y=-3[/tex]
Subtact 45 from both sides:
[tex]16y=-48[/tex]
Divide both sides by 16:
[tex]y=-3[/tex]
Substitute -3 for y in either equation:
[tex]x=-(-3)+3[/tex]
[tex]x=6[/tex]
