Question

(9c – 8d) + (2c – 6) + (–d + 3)=

Answer 1

Explanation: Just addition and subtraction which is easy, I'd remove the brackets first so it won't be too confusing.

$9c-8d+2c-6-d+3=???$

Here, just remember that:

• Plus/Positive multiply Minus/Negative = Minus/Negative
• Plus/Positive multiply Plus/Positive = Positive/Plus
• Minus/Negative multiply Minus/Negative = Positive/Plus

Notice the +(-d+3), (+)(-) = - so it's -d+3

Now just addition and subtraction, for better looking and non-confusing.

$9c+2c-8d-d-6+3=???\\9c+2c-8d-d-6+3=11c-9d-3$

9c+2c = 11c

-8d-d = -9d

-6+3 = -3

Therefore, the answer is $11c-9d-3$

If you are confused, you can reply to this explanation (If it's wrong, let me know.)