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N+3 evaluates to N+3
Multiply 10 by N+3

Multiply 10 by each term in N+3 term by term.

This is the distributive property of multiplication.

Multiply 10 and N
Multiply 1 and N

The N just gets copied along.
10 × N = 10N

Multiply 10 and 3
10 × 3 = 30

10*(N+3) evaluates to 10N+30

***The final answer is 10N+30***

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