Question

упростите выражение -2,5*x*2/5-2 2/3*0,1x

Answer 1

$-2.5x* \frac{2}{5} -2 \frac{2}{3} *0.1x=- \frac{2.5x*2}{5}- \frac{8*0.1x}{3} =- \frac{5x}{5} - \frac{0.8x}{3}=x- \frac{0.8x}{3}=$$\frac{3x-0.8x}{3}= \frac{2.2x}{3}$

Answer 2

-2,5*x*2/5-2 2/3*0,1x = -5/2x × 2/5 - 8/3*1/10x = -x - 4/15x = - 15-4 /15x = -19/15x = -1 4/15x