Sanjay needs 90 meters of fence to go around a rectangular garden.
The length l of the garden is three times its width w.

Three of these equations give the correct value for w.
Which equation does NOT?

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CLEAR CHECK

w+3w=90

w+3w+w+3w=90

2⋅w+2⋅3w=90

2⋅(3w+w)=90

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