olganosovlover olganosovlover 18-11-2022 Mathematics contestada Which options shows the correct first step to solve the system of equations? 3x+4y=5 z=-by+8 O 3x+4y=6y+8 O3(-6y+8)+4y=5 O 3x+4(-6y)=5 O 3x+4(-6y+8)=5