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-5/9 = -x/4 // + -x/4
-(-x/4)-5/9 = 0
(1/4)*x-5/9 = 0
1/4*x-5/9 = 0 // + 5/9
1/4*x = 5/9 // : 1/4
x = 5/9/1/4
x = 20/9
x = 20/9
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