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25 September, 00:26

Simplify 3 (a+5); a=12

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  1. 25 September, 01:45
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    Step-by-step explanation:

    what we know: a=12

    3 (a+5)

    and so if a is 12, in order to solve this equation we are going to substitute a for 12 - meaning this:

    3 (12+5)

    then, you are gonna solve that.

    parenthases means to multiply and so 3*12=36 3*5=15 36+15=51.
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