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2x = 5 + y/ :2
x = 2 i 1/2 + 1/2y
b) ⅓y = x - 3
-x = -3 - ⅓y /: (-1)
x = 3 + ⅓y
c) 3(x - y) = 2x
3x - 3y = 2x
x = 3y
d) ⅔x = ¾y / : ⅔
x = 3/4
e) 4x + 2y = 1
4x = 1 - 2y / :4
x = 1/4 - 1/2y
f) 6x - ⅔y = 2
6x = 2 + ⅔y / :6
x = 1/3 + 1/9y
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