Question

упрастите выражение 4x/3x+3 - x-1/x+1

Answer 1

$\frac{4x}{3x+3} - \frac{x-1}{x+1} = \frac{4x}{3(x+1)} - \frac{x-1}{x+1} = \frac{4x}{3(x+1)} - \frac{3(x-1)}{3(x+1)} = \frac{4x-3(x-1)}{3(x+1)} = \frac{4x-3x+3}{3x+3} = \frac{x+3}{3x+3}$