Solve 30-5*[1-(15-3*6)+9-3*4]

$$30 - 5 \cdot [ 1 - ( 15 - 3 \cdot 6 ) + 9 - 3 \cdot 4 ]$$

Evaluate

$$25$$

Solution Steps

Multiply 3 and 6 to get 18.

$$30-5\left(1-\left(15-18\right)+9-3\times 4\right)$$

Subtract 18 from 15 to get -3.

$$30-5\left(1-\left(-3\right)+9-3\times 4\right)$$

The opposite of -3 is 3.

$$30-5\left(1+3+9-3\times 4\right)$$

Add 1 and 3 to get 4.

$$30-5\left(4+9-3\times 4\right)$$

Add 4 and 9 to get 13.

$$30-5\left(13-3\times 4\right)$$

Multiply 3 and 4 to get 12.

$$30-5\left(13-12\right)$$

Subtract 12 from 13 to get 1.

$$30-5\times 1$$

Multiply 5 and 1 to get 5.

$$30-5$$

Subtract 5 from 30 to get 25.

$$25$$

Factor

$$5^{2}$$