Solve 21-(5-9-5+6)-left(5-9right)4

$$21-(5-9-5+6)- \left( 5-9 \right) 4$$

Evaluate

$$40$$

Solution Steps

Subtract 9 from 5 to get -4.

$$21-\left(-4-5+6\right)-\left(5-9\right)\times 4$$

Subtract 5 from -4 to get -9.

$$21-\left(-9+6\right)-\left(5-9\right)\times 4$$

Add -9 and 6 to get -3.

$$21-\left(-3\right)-\left(5-9\right)\times 4$$

The opposite of -3 is 3.

$$21+3-\left(5-9\right)\times 4$$

Add 21 and 3 to get 24.

$$24-\left(5-9\right)\times 4$$

Subtract 9 from 5 to get -4.

$$24-\left(-4\times 4\right)$$

Multiply -4 and 4 to get -16.

$$24-\left(-16\right)$$

The opposite of -16 is 16.

$$24+16$$

Add 24 and 16 to get 40.

$$40$$

Factor

$$2^{3}\times 5$$