Pre-Algebra Examples

$x + 2 x + 16 = 85$

Step 1

Add $x$ and $2 x$ .

$3 x + 16 = 85$

Step 2

Move all terms not containing $x$ to the right side of the equation.

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Step 2.1

Subtract $16$ from both sides of the equation.

$3 x = 85 - 16$

Step 2.2

Subtract $16$ from $85$ .

$3 x = 69$

Step 3

Divide each term in $3 x = 69$ by $3$ and simplify.

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Step 3.1

Divide each term in $3 x = 69$ by $3$ .

$\frac{3 x}{3} = \frac{69}{3}$

Step 3.2

Simplify the left side.

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Step 3.2.1

Cancel the common factor of $3$ .

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Step 3.2.1.1

Cancel the common factor.

$\frac{3 x}{3} = \frac{69}{3}$

Step 3.2.1.2

Divide $x$ by $1$ .

$x = \frac{69}{3}$

Step 3.3

Simplify the right side.

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Step 3.3.1

Divide $69$ by $3$ .

$x = 23$