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24 August, 13:43

Describe how to substitute an ordered pair into an equation.

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  1. 24 August, 14:03
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    Let's say you have the equation

    5x + 3y = 11

    You are asked to test the ordered pair (1, 2) to see if it is a solution of the equation. A solution of the equation will make the equation a true statement. The ordered pair (1, 2) has 1 as its x-coordinate and 2 as its y-coordinate.

    Substitute 1 for x and 2 for y in the equation. Then work it out to see if it is a true statement.

    5x + 3y = 11

    5 (1) + 3 (2) = 11

    5 + 6 = 11

    11 = 11

    Since 11 = 11 is a true statement, the ordered pair (1, 3) is a solution of the equation.
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