Question

Найди корень уравнения
0,2(х – 3) – 1 = 0,5(х + 3) — 0,4​

Answer 1

$0.2(x - 3) - 1 = 0.5(x + 3) - 0.4 \\ 0.2x - 0.6 - 1 = 0.5x + 1.5 - 0.4 \\ 0.2x - 1.6 = 0.5x + 1.1 \\ 0.2x - 0.5x = 1.1 + 1.6 \\ - 0.3x = 2.7 \\ x = - 9$