If y = 4 and 6y = 10z + y, then z =?

Adapted from “Letting Go,” part of A Southern Woman’s Story by Phoebe Yates Pember (1879) Instructing him to find the doctor immediately and hastily getting on some clothing I hurried to the scene, for Fisher was an especial favorite. He was quite a young man, of about twenty years of age, who had been wounded ten months previously, very severely, high up on the leg near the hip and who by dint of hard nursing; good food and plenty of stimulant had been given a fair chance for recovery. The bones of the broken leg had slipped together, then lapped, and nature anxious as she always is to help herself had thrown a ligature across, uniting the severed parts; but after some time the side curved out, and the wounded leg was many inches shorter than its fellow. He had remained through all his trials, stout, fresh and hearty, interesting in appearance, and so gentle-mannered and uncomplaining that we all loved him. Supported on his crutches he had walked up and down his ward for the first time since he was wounded, and seemed almost restored. That same night he turned over and uttered an exclamation of pain. Following the nurse to his bed, and turning down the covering, a small jet of blood spurted up. The sharp edge of the splintered bone must have severed an artery. I instantly put my finger on the little orifice and awaited the surgeon. He soon came – took a long look and shook his head. The explanation was easy; the artery was imbedded in the fleshy part of the thigh and could not be taken up. No earthly power could save him. The hardest trial of my duty was laid upon me; the necessity of telling a man in the prime of life, and fullness of strength that there was no hope for him. It was done at last, and the verdict received patiently and courageously, some directions given by which his mother would be informed of his death, and then he turned his questioning eyes upon my face. "How long can I live?" "Only as long as I keep my finger upon this artery." A pause ensued. God alone knew what thoughts hurried through that heart and brain, called so unexpectedly from all earthly hopes and ties. He broke the silence at last. "You can let go –" But I could not. Not if my own life had trembled in the balance. Hot tears rushed to my eyes, a surging sound to my ears, and a deathly coldness to my lips. The pang of obeying him was spared me, and for the first and last time during the trials that surrounded me for four years, I fainted away. No words can do justice to the uncomplaining nature of the Southern soldier. Whether it arose from resignation or merely passive submission, yet when shown in the aggregate in a hospital, it was sublime. Day after day, whether lying wasted by disease or burning up with fever, torn with wounds or sinking from debility, a groan was seldom heard. The wounded wards would be noisily gay with singing, laughing, fighting battles o'er and o'er again, and playfully chaffing each other by decrying the troops from different States, each man applauding his own. The revelation that this incident was the only time the author fainted during the war serves to __________.

The cat __________ crept across the lawn, gracefully __________ the dog.