Trigonometry Examples

$9 x + 1 - 9 x = 5 - 4$

Step 1

Combine the opposite terms in $9 x + 1 - 9 x$ .

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Step 1.1

Subtract $9 x$ from $9 x$ .

$0 + 1 = 5 - 4$

Step 1.2

Add $0$ and $1$ .

$1 = 5 - 4$

Step 2

Subtract $4$ from $5$ .

$1 = 1$

Step 3

Since the two sides have been shown to be equivalent, the equation is an identity.

$9 x + 1 - 9 x = 5 - 4$ is an identity.