Pre-Algebra Examples

$y = x + 4$

Substitute $- 2$ for $x$ and find the result for $y$ .

$y = (- 2) + 4$

Solve the equation for $y$ .

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Remove the parentheses around the expression $- 2$ .

$y = - 2 + 4$

Add $- 2$ and $4$ .

$y = 2$

Substitute $- 1$ for $x$ and find the result for $y$ .

$y = (- 1) + 4$

Solve the equation for $y$ .

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Remove the parentheses around the expression $- 1$ .

$y = - 1 + 4$

Add $- 1$ and $4$ .

$y = 3$

Substitute $0$ for $x$ and find the result for $y$ .

$y = (0) + 4$

Solve the equation for $y$ .

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Remove the parentheses around the expression $0$ .

$y = 0 + 4$

Add $0$ and $4$ .

$y = 4$

Substitute $1$ for $x$ and find the result for $y$ .

$y = (1) + 4$

Solve the equation for $y$ .

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Remove the parentheses around the expression $1$ .

$y = 1 + 4$

Add $1$ and $4$ .

$y = 5$

Substitute $2$ for $x$ and find the result for $y$ .

$y = (2) + 4$

Solve the equation for $y$ .

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Remove the parentheses around the expression $2$ .

$y = 2 + 4$

Add $2$ and $4$ .

$y = 6$

This is a table of possible values to use when graphing the equation.

$\begin{array}{c} x & y \\ - 2 & 2 \\ - 1 & 3 \\ 0 & 4 \\ 1 & 5 \\ 2 & 6 \end{array}$

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