Basic Math Examples

$- 9 + 4 r = 4 r - 3 - 6$

Step 1

Subtract

$6$ from

$- 3$ .

$- 9 + 4 r = 4 r - 9$

Step 2

Move all terms containing

$r$ to the left side of the equation.

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Step 2.1

Subtract

$4 r$ from both sides of the equation.

$- 9 + 4 r - 4 r = - 9$

Step 2.2

Combine the opposite terms in

$- 9 + 4 r - 4 r$ .

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Step 2.2.1

Subtract

$4 r$ from

$4 r$ .

$- 9 + 0 = - 9$

Step 2.2.2

Add

$- 9$ and

$0$ .

$- 9 = - 9$

Step 3

Since

$- 9 = - 9$ , the equation will always be true for any value of

$r$ .

All real numbers

Step 4

The result can be shown in multiple forms.

All real numbers

Interval Notation:

$(- \infty, \infty)$