Solve (15*3-12*5)*(-2)+10div(-2)-7*(-2-1)

$$(15 \times 3-12 \times 5) \times (-2)+10 \div (-2)-7 \times (-2-1)$$

Evaluate

$$46$$

Solution Steps

Multiply 15 and 3 to get 45.

$$\left(45-12\times 5\right)\left(-2\right)+\frac{10}{-2}-7\left(-2-1\right)$$

Multiply 12 and 5 to get 60.

$$\left(45-60\right)\left(-2\right)+\frac{10}{-2}-7\left(-2-1\right)$$

Subtract 60 from 45 to get -15.

$$-15\left(-2\right)+\frac{10}{-2}-7\left(-2-1\right)$$

Multiply -15 and -2 to get 30.

$$30+\frac{10}{-2}-7\left(-2-1\right)$$

Divide 10 by -2 to get -5.

$$30-5-7\left(-2-1\right)$$

Subtract 5 from 30 to get 25.

$$25-7\left(-2-1\right)$$

Subtract 1 from -2 to get -3.

$$25-7\left(-3\right)$$

Multiply 7 and -3 to get -21.

$$25-\left(-21\right)$$

The opposite of -21 is 21.

$$25+21$$

Add 25 and 21 to get 46.

$$46$$

Factor

$$2\times 23$$