Basic Math Examples

$29 - (- 7 a) = 13$

Step 1

Multiply $- 7$ by $- 1$ .

$29 + 7 a = 13$

Step 2

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

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Step 2.1

Subtract $29$ from both sides of the equation.

$7 a = 13 - 29$

Step 2.2

Subtract $29$ from $13$ .

$7 a = - 16$

Step 3

Divide each term in $7 a = - 16$ by $7$ and simplify.

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Step 3.1

Divide each term in $7 a = - 16$ by $7$ .

$\frac{7 a}{7} = \frac{- 16}{7}$

Step 3.2

Simplify the left side.

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Step 3.2.1

Cancel the common factor of $7$ .

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Step 3.2.1.1

Cancel the common factor.

$\frac{7 a}{7} = \frac{- 16}{7}$

Step 3.2.1.2

Divide $a$ by $1$ .

$a = \frac{- 16}{7}$

Step 3.3

Simplify the right side.

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Step 3.3.1

Move the negative in front of the fraction.

$a = - \frac{16}{7}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$a = - \frac{16}{7}$

Decimal Form:

$a = - 2.\overline{285714}$

Mixed Number Form:

$a = - 2 \frac{2}{7}$