Question

X-1,2 · (x-1) = 0,6 X + 0,0

Answer 1

$x - 1.2 \times (x - 1) = 0.6x + 0.4 \\ x - 1.2x + 1.2 = 0.6x + 0.4 \\ 0.4x - 1.2x = 0.4 - 1.2 \\ x(0.4 - 1.2) = 0.4 - 1.2 \\\implies \ x = 1$