Henrique began to solve a system of linear equations using the linear combination method. His work is shown below:3(4x – 7y = 28) → 12x – 21y = 84–2(6x – 5y = 31) → –12x + 10y = –62 12x – 21y = 84+ –12x + 10y = –62 –11y = 22y = –2