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3/10 = -x/330 // + -x/330
3/10-(-x/330) = 0
(1/330)*x+3/10 = 0
1/330*x+3/10 = 0 // - 3/10
1/330*x = -3/10 // : 1/330
x = -3/10/1/330
x = -99
x = -99
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