5w+7-3w=21

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Solution for 5w+7-3w=21 equation: 


w in (-oo:+oo)

5*w-(3*w)+7 = 21 // - 21

5*w-(3*w)-21+7 = 0

5*w-3*w-21+7 = 0

2*w-14 = 0 // + 14

2*w = 14 // : 2

w = 14/2

w = 7

w = 7

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