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freckles
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Hey so...
Pretend like I draw a number line...
And we start with the first number of that statement which is 5
dw:1342564524881:dw

freckles
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And we count over 7 to the left because 7 has a minus in front of it

freckles
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Where will be if count over 7 units to the left of 5?

hother
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2?

freckles
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dw:1342564629525:dw
No 2 is 3 units to the left of 5

hother
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2?

freckles
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right! :)

hother
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i knew that ;)

freckles
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57 and 5+(7) mean the same thing by the way :)

freckles
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You might need to know that for later.
Have fun.
And practice...practice... you'll be good at these in no time. :)