Seudónimo Seudónimo 29-10-2018 Mathematics contestada WILL GIVE BRAINLIEST ian solved the system of equations by making a substitution for y in the second equation. What equation did he get as a result of that substitution? y=-3x+1 5x-2y=31 A. 5x+6x+1=31 B. 5x+6x-2=31 C. -15x+5x=31 D. -15x-x=31
