2w+21=4

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Solution for 2w+21=4 equation: 



2w+21=4

We move all terms to the left:

2w+21-(4)=0

We add all the numbers together, and all the variables

2w+17=0

We move all terms containing w to the left, all other terms to the right

2w=-17

w=-17/2

w=-8+1/2

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