Odpowiedzi

2009-12-16T15:07:17+01:00
A] 1 1/2 * x= 1

3/2*x=1 /:3/2
x=2/2/3/2
x= 2/2 *2/3
x= 2/3

b)
[(1 1/2)²-1 3/5 : 1 1/3]:21= [ 9/4 - 8/4:4/3] :21= 9/4- 8/5 * 3/4] :21= [9/4-6/5]:21= [45/20-24/20]:21= 21/20:21= 21/20*1/21= 1/20
2009-12-16T15:32:10+01:00

1 1/2*x=1 /:1 1/2
x=2/2 / 3/2
x= 2/2  * 2/3
x= 2/3


[(1 1/2)^2-1 3/5 : 1 1/3]:21= [ 9/4 - 8/4:4/3] :21= 9/4- 8/5 * 3/4] :21= [9/4-6/5]:21= [45/20-24/20]:21= 21/20:21= 21/20*1/21= 1/20