Вправи 301 - 400 » 359 (3-4)

3) (–2 • 15)–2 = 25–1 • x; (–2 • 3 • 5)–2 = (52)–1 • x; (–6)–2 • 5–2 = 5–2 • x |: 5–2; x = 1/〖(-6)〗^2 = (1/6)2. 4) 100–14 = 5–28 • x; (25 • 4)–14 = 5–28 • x; 25–14 • 4–14 = 5–28 • x; (52)–14 • 4–14 = 5–28 • x; 5–28 • 4–14 = 5–28 • x |: 5–28; x = 4–14.