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2/3 = -x/60 // + -x/60
2/3-(-x/60) = 0
(1/60)*x+2/3 = 0
1/60*x+2/3 = 0 // - 2/3
1/60*x = -2/3 // : 1/60
x = -2/3/1/60
x = -40
x = -40
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