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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

Answer :

thistleBranch

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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