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2 September, 15:08

Suri's age is 4 less than 3 times her cousin's age. Suri is 17 years old. Which method can be

used to find c her cousin's age?

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Answers (2)
  1. 2 September, 18:07
    0
    Add 4 to 17, then divide both sides by 3.

    Step-by-step explanation:

    Given that:

    Suri's age is 4 less than 3 times her cousin's age

    Suri is 17 years old

    Let her cousin's age be c

    Then;

    3c - 4 = 17

    By adding 4 to 17; we have

    3c = 17 + 4

    3c = 21

    Now, dividing both sides by 3; we have

    3c/3 = 21/3

    c = 7

    The age of her cousin is 7 years
  2. 2 September, 18:38
    0
    Algebraic equation

    Step-by-step explanation:

    We would use an algebraic equation.

    An algebraic equation is a mathematical statement in which two expressions are made equal to each other using the equal sign.

    In this case the algebraic equation consists of constant, variables and algebraic operation.

    One of the type of algebraic equation is a linear equation. The expression below relating suri's age with her cousin's is a linear equation.

    We can derive equations from sentences that involves unknown values by representing them with variables such as x, y, etc.

    Suri's age = 17years old

    Let Suri's cousin's age = x

    3 times her cousin's age = 3x

    Suri's age = 4 less than 3 times her cousin's age = 3x-4

    17 = 3x-4

    3x = 17+4 = 21

    x = 21/3

    x = 7

    Her cousins age = 3x = 3*7

    Her cousins age = 21 years
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