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Help for number 1 through 4

Help for number 1 through 4-example-1
User Benz
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1) Find a common factor of 21 and 35!

7(5+3)

2) Key word is product! You are subtracting 3 from the product of 5 and 8.

(5 x 8)-3

3) 12m+12n= 12(m+n)
User The Lemon
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