Finite Math Examples

$f (x) = 3 (5 z) - 4$

Step 1

Set $3 (5 z) - 4$ equal to $0$ .

$3 (5 z) - 4 = 0$

Step 2

Solve for $x$ .

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Step 2.1

Multiply $5$ by $3$ .

$15 z - 4 = 0$

Step 2.2

Add $4$ to both sides of the equation.

$15 z = 4$

Step 2.3

Divide each term in $15 z = 4$ by $15$ and simplify.

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Step 2.3.1

Divide each term in $15 z = 4$ by $15$ .

$\frac{15 z}{15} = \frac{4}{15}$

Step 2.3.2

Simplify the left side.

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Step 2.3.2.1

Cancel the common factor of $15$ .

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Step 2.3.2.1.1

Cancel the common factor.

$\frac{15 z}{15} = \frac{4}{15}$

Step 2.3.2.1.2

Divide $z$ by $1$ .

$z = \frac{4}{15}$

Step 3