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This equation shows how the total number of souvenirs Deion buys is related to the number of days he spends on vacation. $\newline$ $s = d + 1$ $\newline$ The variable $d$ represents the number of days he spends on vacation, and the variable $s$ represents the total number of souvenirs he buys. After $3$ days of vacation, how many total souvenirs will Deion have bought? $\newline$ _____ souvenirs

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Find a value using two-variable equations: word problems

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Q. This equation shows how the total number of souvenirs Deion buys is related to the number of days he spends on vacation.

\newline

s = d + 1

\newline

The variable

d

represents the number of days he spends on vacation, and the variable

s

represents the total number of souvenirs he buys. After

3

days of vacation, how many total souvenirs will Deion have bought?

\newline

_____ souvenirs

Identify variable: Identify the variable that $3$ days of vacation corresponds to. $d$ represents the number of days Deion spends on vacation. So, $3$ days gives the value for $d$ .
Plug in value: We know that $d = 3$ . Plug in the value for $d$ in $s = d + 1$ . $s = d + 1$ . Substitute $d$ with $3$ . $s = 3 + 1$
Solve for $s$ : $s = 3 + 1$ . Solve for $s$ . $s = d + 1$ . $s = 3 + 1 = 4$ . Therefore, the total number of souvenirs Deion will have bought after $3$ days of vacation is $4$ .

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