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(-4/5)*x+2/15 = (-2/3)*x+1/9 // - (-2/3)*x+1/9
(-4/5)*x-((-2/3)*x)+2/15-(1/9) = 0
(-4/5)*x+(2/3)*x+2/15-1/9 = 0
1/45-2/15*x = 0 // - 1/45
-2/15*x = -1/45 // : -2/15
x = -1/45/(-2/15)
x = 1/6
x = 1/6
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