Solve for k 30+2k+5k=100

$30 + 2 k + 5 k = 100$

Add $2 k$ and $5 k$ .

$30 + 7 k = 100$

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

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Subtract $30$ from both sides of the equation.

$7 k = 100 - 30$

Subtract $30$ from $100$ .

$7 k = 70$

Divide each term by $7$ and simplify.

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Divide each term in $7 k = 70$ by $7$ .

$\frac{7 k}{7} = \frac{70}{7}$

Cancel the common factor of $7$ .

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Cancel the common factor.

$\frac{7 k}{7} = \frac{70}{7}$

Divide $k$ by $1$ .

$k = \frac{70}{7}$

Divide $70$ by $7$ .

$k = 10$

Solve for k 30+2k+5k=100

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