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Noah solved the equation In the following way. What mistake did he make?

Noah Solved The Equation In The Following Way What Mistake Did He Make class=

Sagot :

Answer:

When Noah subtracts 9 from each side, he does not use the distributive property.  Since the equation is 2(x-9), Noah needs to multiply 9 by two before subtracting.  He needs to subtract 18 from each side.