20=7w+4w+9

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Solution for 20=7w+4w+9 equation: 


w in (-oo:+oo)

20 = 7*w+4*w+9 // - 7*w+4*w+9

20-(7*w)-(4*w)-9 = 0

20-7*w-4*w-9 = 0

11-11*w = 0 // - 11

-11*w = -11 // : -11

w = -11/(-11)

w = 1

w = 1

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