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write an equivalent expression by combining like terms 5x+9+-7x=?x+9

Sagot :

Answer:

Step-by-step explanation:

5x + 9 + (-7x) = x + 9

All x terms on the right and constants on the left

5x + (-7x) - x = 9 - 9

5x - 7x - x = 0

5x - 8x = 0

-3x = 0

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