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x=1 i 1/2-4/5
x=3/2-4/5
x=15/10-8/10
x=7/10
b)x-4/5=1 i 1/2
x=1 i 1/2+4/5
x=3/2+4/5
x=15/10+8/10
x=23/10
x=2 i 3/10
c)5 i 4/9+x=7 i 1/2
x=7 i 1/2-5 i 4/9
x=15/2-49/9
x=135/18-98/18
x=37/18
x=2 i 1/18
d)x-2 i 3/4=5 i 6/7
x=5 i 6/7+2 i 3/4
x=41/7+11/4
x=164/28+77/28
x=241/28
x=8 i 17/28
e)8 i 1/12-x=5 i 1/4
x=8 i 1/12-5 i 1/4
x=97/12-21/4
x=97/12-36/12
x=34/12
x=2 i 10/12
x=2 i 5/6
f)6 i 3/7-x=2 i 1/2
x=6 i 3/7-2 i 1/2
x=45/7-5/2
x=90/14-35/14
x=55/14
x=3 i 13/14