782. Теңдеуді шешіңдер:

1) х=2/3х+1
2)х-1/2=3/4х
3)х-2/3=5/6х
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X=2/3x+1

x-2/3x=1

1/3x=1

x=3

x-1/2=3/4x

x-3/4=1/2

1/4x=1/2

x=2

x-2/3=5/6x

x-5/6x=2/3

1/6x=2/3

x=4

1 4/5y=y+4

1 4/5y-y=4

4/5y=4

y=5

2/3y-1/3=5/9y

2/3y-5/9y=1/3

1/9y=1/3

y=3

3/4y-2/3=7/12y

3/4y-7/12y=2/3

9/12y-7/12y=2/3

1/6y=2/3

y=4