Pre-Algebra Examples

$y = 5 - 2 x$

Step 1

Reorder $5$ and $- 2 x$ .

$y = - 2 x + 5$

Step 2

Choose any value for $x$ that is in the domain to plug into the equation.

Step 3

Choose $0$ to substitute in for $x$ to find the ordered pair.

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Step 3.1

Remove parentheses.

$y = - 2 \cdot 0 + 5$

Step 3.2

Simplify $- 2 \cdot 0 + 5$ .

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Step 3.2.1

Multiply $- 2$ by $0$ .

$y = 0 + 5$

Step 3.2.2

Add $0$ and $5$ .

$y = 5$

Step 3.3

Use the $x$ and $y$ values to form the ordered pair.

$(0, 5)$

Step 4

Choose $1$ to substitute in for $x$ to find the ordered pair.

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Step 4.1

Remove parentheses.

$y = - 2 \cdot 1 + 5$

Step 4.2

Simplify $- 2 \cdot 1 + 5$ .

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Step 4.2.1

Multiply $- 2$ by $1$ .

$y = - 2 + 5$

Step 4.2.2

Add $- 2$ and $5$ .

$y = 3$

Step 4.3

Use the $x$ and $y$ values to form the ordered pair.

$(1, 3)$

Step 5

Choose $2$ to substitute in for $x$ to find the ordered pair.

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Step 5.1

Remove parentheses.

$y = - 2 \cdot 2 + 5$

Step 5.2

Simplify $- 2 \cdot 2 + 5$ .

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Step 5.2.1

Multiply $- 2$ by $2$ .

$y = - 4 + 5$

Step 5.2.2

Add $- 4$ and $5$ .

$y = 1$

Step 5.3

Use the $x$ and $y$ values to form the ordered pair.

$(2, 1)$

Step 6

These are three possible solutions to the equation.

$(0, 5), (1, 3), (2, 1)$

Step 7