Question

Need help
6n - 3(2n - 5)

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Answer 1

6n-3(2n-5)
6n-(6n-15)
6n-6n+15
(6n-6n)+15
=15

Answer 2

6n - 3(2n-5)

mutiply the bracket by -3

(-3)(2n)= -6n

(-3)(-5)= 15

6n-6n+15

0+15

answer:

15