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x = 0 - 5
x = -5
2) x - 5 = 0
x = 0 + 5
x = 5
3) 3x = 15
x = 15 / 3
x = 5
Jadi, persamaan yang ekuivalen adalah 2 dan 3
karena pindah ruasjadi X = 5
dan 3x = 15
x = 15/3
x = 5
jadi yang ekuivalen 2 dan 3