Basic Math Examples

$(2 n + 9) + (5 n - 4) = 6 n + 9$

Step 1

Simplify $2 n + 9 + 5 n - 4$ .

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Step 1.1

Add $2 n$ and $5 n$ .

$7 n + 9 - 4 = 6 n + 9$

Step 1.2

Subtract $4$ from $9$ .

$7 n + 5 = 6 n + 9$

Step 2

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

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Step 2.1

Subtract $6 n$ from both sides of the equation.

$7 n + 5 - 6 n = 9$

Step 2.2

Subtract $6 n$ from $7 n$ .

$n + 5 = 9$

Step 3

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

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Step 3.1

Subtract $5$ from both sides of the equation.

$n = 9 - 5$

Step 3.2

Subtract $5$ from $9$ .

$n = 4$