Solve -2b-4b-2b-5c-2b-8+3b-5b+3b-4c-3b*7

$$- 2 b - 4 b - 2 b - 5 c - 2 b - 8 + 3 b - 5 b + 3 b - 4 c - 3 b \cdot 7$$

Evaluate

$$-30b-9c-8$$

Solution Steps

Combine -2b and -4b to get -6b.

$$-6b-2b-5c-2b-8+3b-5b+3b-4c-3b\times 7$$

Combine -6b and -2b to get -8b.

$$-8b-5c-2b-8+3b-5b+3b-4c-3b\times 7$$

Combine -8b and -2b to get -10b.

$$-10b-5c-8+3b-5b+3b-4c-3b\times 7$$

Combine -10b and 3b to get -7b.

$$-7b-5c-8-5b+3b-4c-3b\times 7$$

Combine -7b and -5b to get -12b.

$$-12b-5c-8+3b-4c-3b\times 7$$

Combine -12b and 3b to get -9b.

$$-9b-5c-8-4c-3b\times 7$$

Combine -5c and -4c to get -9c.

$$-9b-9c-8-3b\times 7$$

Multiply 3 and 7 to get 21.

$$-9b-9c-8-21b$$

Combine -9b and -21b to get -30b.

$$-30b-9c-8$$

Differentiate w.r.t. b

$$-30$$