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26-02-2021
Mathematics

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if 3x - 3y = 9 and x + y = 5. then x equals...?

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26-02-2021

Answer: x = 4

Step-by-step explanation:

x + y = 5

y = 5 - x

3x - 3y = 9

=> 3x - 3(5-x) = 9

=> 3x - 15 + 3x = 9

=> 6x = 24

=> x = 4

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