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7.(y.3) use one or more properties to rewrite without parentheses

Directions state to use one or more properties to rewrite the expression as an expression that does not use parentheses. another question example is (a+5) + 23

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if you're trying to rewrite 7*(y*3), then you just multiply 7 by 3y and you would get 21y

7*(y*3) = 7*(3*y) = (7*3)*y = 21y


and for the other example question

(a+5)+23 = a+(5+23) = a+28

so, could it be the number first, then the variable? or just the variable then the number, or does it not matter?