Question

Va rog ajutatima cu urmatoarele exercitii:2-a=1 supra 2 ; 4 supra 8 + a - 1 supra 8 = 5 supra 8 ; 7 supra 5 - ( 8 supra 5 - a )= 2 supra 5 ; 8 supra 3 + 4 supra 3 - ( a + 3 supra 3) = 8 supra 3 ; a + 2 supra 8 = 2 supra 7. Va rog frumos sa ma ajutati. Multumesc.

Answer 1

2-a=1/2
a=2-1/2
a=4/2-1/2
a=3/2

4/8 + a - 1/8 = 5/8
a+3/8=5/8
a=5/8-3/8
a=2/8
a=1/4

7/5 - ( 8/5 - a )= 2/5
7/5-8/5+a=2/5
-1/5+a=2/5
a=2/5+1/5
a=3/5

8/3 + 4/3 - ( a + 3/3) = 8/3
12/3 - a -3/3 = 8/3
a=9/3-8/3
a=1/3

a + 2/8 = 2/7
a + 1/4 = 2/7
a=2/7-1/4
a=8/28-7/28
a=1/28