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8 December, 15:01

Addie is j years old. Zach is 3 yrs older than Addie. The sum of their age is s years. Express s in terms of j.

Write a linear equation

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  1. 8 December, 15:20
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    s = 2j + 3.

    For instance, if addie was 5, you could find the sum of their ages by substituting her age into the formula.

    s = 2 (5) + 3

    S = 13
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