Question
Evaluate:
− 7x + 9x + 2x − 2x
− 7x + 9x + 2x − 2x
✓
Answer
− 7x + 9x + 2x − 2x
= 9x + 2x − 7x − 2x
= 11x − 9x
= 2x
= 9x + 2x − 7x − 2x
= 11x − 9x
= 2x
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