Răspunsuri

2014-03-11T21:51:13+02:00
3/8x1680=2/10xY
3/8x1680/1=2Y/10
2Y/10=5040/8
Y=5040/8:2/10
Y=504/4
Y=126 
2014-03-11T21:53:29+02:00
\dfrac38\cdot1680=\dfrac{2}{10}\cdot x

3\cdot210=\dfrac x5\Rightarrow x=630\cdot5=3150
x=630:5 => x=126
NU inmultire , ci impartire !
Răspunsuri
3/8x1680=2/10xY
3/8x1680/1=2Y/10
2Y/10=5040/8
Y=5040/8:2/10
Y=504/4
Y=126