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Smile =]™ asked in Science & MathematicsMathematics · 1 decade ago

Simplifying Variable Expressions?

My friend needs homework help. Its about simplifying variable expressions. Here's the problem:

Justify each step.

___________= 5n + (20+9n)

___________= 5n + (20+9n)

___________= (5n + 9n) +20

Please answer soon it's getting late

2 Answers

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  • Anonymous
    1 decade ago
    Favourite answer

    1.

    5n + (20 + 9n) = y

    5n + 9n + 20 = y

    14n +20 = y

    2.

    5n + (20 + 9n) = y

    5n + 9n + 20 = y

    14n +20 = y

    3.

    (20 + 9n) + 5n = y

    5n + 9n + 20 = y

    14n +20 = y

    The three equations are the same as shown above in the solution. Hope it helps

  • nitish
    1 decade ago

    1.14n+20

    2.14n +20

    3.14n+20

    i.e. all the three are same

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