№ 684
у = 2х + 5у(1) = 2 • 1 + 5 = 7у(0) = 2 • 0 + 5 = 5у(–3) = –3 • 2 + 5 = –1у(7) = 2 • 7 + 5 = 19у(1000) = 2 • 1000 + 5 = 2005
вправи поруч