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3x = y + 2
x = .(y + 2)
(x) = .(x + 2)
b) f(x) = x - 4 ----> y = x - 4
x = y + 4
(x) = x + 4
c) f(x) = 1 - 9x -----> y = 1 - 9x
9x = 1 - y
x = (1 - y)
(x) = (1 - x)
d) f(x) = - 2x -----> 2x = - y
x = ( - y)
(x) = .( - x)
(x) = - x
e) f(x) = + 6x
y = + 6x ...kalikan denga 4
4y = x + 24x
4y = 25x
x = y
(x) = .x