7w-28/4=21

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Solution for 7w-28/4=21 equation: 


w in (-oo:+oo)

7*w-(28/4) = 21 // - 21

7*w-(28/4)-21 = 0

7*w-21-7 = 0

7*w-28 = 0 // + 28

7*w = 28 // : 7

w = 28/7

w = 4

w = 4

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