1) x = 2/3x+1
x-2/3x = 1
3/3x-2/3x = 1
1/3x = 1
x = 1*3 = 3
2) x-1/2 = 3/4x
x-3/4x = 1/2
4/4x-3/4x = 1/2
1/4x = 1/2
x = (1/2)*4
x = 2
3) x-2/3 = 5/6x
x-5/6x = 2/3
6/6x-5/6x = 2/3
1/6x = 2/3
x = (2/3)*6
x = 4
4) 1 4/5y = y+4
1 4/5y -y = 4
4/5y = 4
y = 4*(5/4)
y = 5
5) 2/3y-1/3 = 5/9y
2/3y-5/9y = 1/3
6/9y-5/9y = 1/3
1/9y = 1/3
y = 1/3*(9/1)
y = 3
6) 3/4y-2/3 = 7/12y
3/4y-7/12y = 2/3
9/12y-7/12y = 2/3
2/12y = 2/3
y = (2/3)*(12/2)
y = 4