4. True or false III

1. For every rational number \(x\), \(x + 1 = x\).
 
2. For all rational numbers \(x\) and \(y\), \(x - y = y - x\).
 
3. For all rational numbers \(x\) and \(y\), \(x \times y = y \times x\).
 
4. For every rational number \(x\), \(x \times 0 = x\).
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