Think of the 'd' as an apple
Since we have -5, think of that negative number as you're owing someone 5 something. You owe someone 5 apples and you have 4 apples so you give it to him.
How many apples do you now owe or have left?
Tonycoolkid21:
1?
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Tranquility:
Essentially what is
-5 + 4
and then remember to add the 'd' back again
We can only add things that are like terms so -5d + 4d can be added
However, if it was 2 and 2a. You cannot add them because one has an 'a' and the other does not.
Tranquility:
@tonycoolkid21 wrote:
1?
Yes, you owe 1 apple still. And owing someone means you're in the negative so that would mean you ultimately have -1 apple since you owe an apple to someone else.
Tonycoolkid21:
what next were do i add 1 in d
Tranquility:
Can you tell me what
-5 + 4 = ?
Tranquility:
And then you should be able to easily figure out what -5d + 4d equals to
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Tonycoolkid21:
@tranquility wrote:
Can you tell me what
-5 + 4 = ?
-1
Tranquility:
Yes so -5d + 4d is going to be -1d
You can write that also as just `-d` because the 1 is implied
Tonycoolkid21:
nvm this will mess up my brain am go ask my sister