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x+4/5=1 1/2
x=1 1/2-4/5
x=1 5/10-8/10
x=15/10-8/10
x=7/10
b)
x-4/5=1 1/2
x=1 1/2+4/5
x=1 5/10+8/10
x=1 13/10
x=2 3/10
c)
5 4/9+x=7 1/2
x=7 1/2-5 4/9
x=7 9/18-5 8/18
x=2 1/18
d)
x-2 3/4=5 6/7
x=5 6/7+2 3/4
x=5 24/28+2 21/28
x=7 45/28
x=8 17/28
e)
8 1/12-x=5 1/4
-x=5 1/4-8 1/12 /*(-1)
x=8 1/12-5 3/12
x=7 13/12-5 3/12
x=7 10/12
x=7 5/6
f)
6 3/7-x=2 1/2
-x=2 1/2-6 3/7 /*(-1)
x=6 6/14-2 7/14
x=5 20/14-2 7/14
x=3 13/14
x=1 1/2-4/5
x=1 5/10-8/10
x=7/10
b)x-4/5=1 1/2
x=4/5+1 1/2
x=8/10+1 5/10
x=2 3/10
c)5 4/9+x=7 1/2
x=7 1/2-5 4/9
x=7 9/18-5 8/18
x=2 1/18
d)x-2 3/4=5 6/7
x=2 3/4+5 6/7
x=2 18/28+5 24/28
x=7 42/28
x=8 14/28
x=8 1/2
e)8 1/12-x=5 1/4
8 1/12-5 1/4=x
8 1/12-5 3/12=x
x=2 10/12
x=2 5/6
f)6 3/7-x=2 1/2
6 3/7-2 1/2=x
6 6/14-2 7/14=x
x=3 13/14