Question

упростить выражение 3/14x-4/21x+7/28x

Answer 1

3/14x-4/21x+7/28x = 3/14х-4/21х+1/4х=18/84х-16/84х+21/84х=23/84х

Answer 2

$frac{3}{14}x- frac{4}{21}x + frac{7}{28}x = frac{3}{14}x- frac{4}{21}x+ frac{1}{4}x = frac{(6*3-4*4+1*21)}{84}x= frac{(18-16+21)}{84}x=\=frac{23}{84}x$

Answer 3

откуда вылезло А?

Answer 4

*x