Basic Math Examples

$45 - 4 r = 45 - 4 r$

Step 1

Move all terms containing $r$ to the left side of the equation.

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Step 1.1

Add $4 r$ to both sides of the equation.

$45 - 4 r + 4 r = 45$

Step 1.2

Combine the opposite terms in $45 - 4 r + 4 r$ .

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Step 1.2.1

Add $- 4 r$ and $4 r$ .

$45 + 0 = 45$

Step 1.2.2

Add $45$ and $0$ .

$45 = 45$

Step 2

Since $45 = 45$ , the equation will always be true for any value of $r$ .

All real numbers

Step 3

The result can be shown in multiple forms.

All real numbers

Interval Notation:

$(- \infty, \infty)$