



 
Hi, I would use the commutative law for multiplication of the real numbers to solve this. The commutative law says that for any real numbers $a$ and $b, a \times b = b \times a.$ For your question if you let $a = 2$ and $b = x + 3,$ then by the commutative law \[2 \times (x + 3) = (x + 3) \times 2.\] hence by the commutative law \[2(x + 3) = y \mbox{ and } (x + 3)2 = y\] are two ways to write the same equation. Penny  


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