SOLUTION: Explain how you can verify that “3(2x + 5) = 9 + 3x” and “x = –2” are equivalent equations

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Question 633681: Explain how you can verify that “3(2x + 5) = 9 + 3x” and “x = –2” are equivalent equations
Answer by Maths68(1474) About Me  (Show Source):
You can put this solution on YOUR website!
3(2x + 5) = 9 + 3x
6x+15=9+3x
6x-3x=9-15
3x=-6
3x/3=-6/3
x=-2

Or

Put x=-2 in the given equation
3(2x + 5) = 9 + 3x
3(2(-2) + 5) = 9 + 3(-2)
3(-4+5)=9-6
3(1)=3
3=3