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(-2/30)*(6*x-27) = -4 // + 4
(-2/30)*(6*x-27)+4 = 0
4-1/15*(6*x-27) = 0
4-1/15*(6*x-27) = 0
29/5-2/5*x = 0
29/5-2/5*x = 0
29/5-2/5*x = 0 // - 29/5
-2/5*x = -29/5 // : -2/5
x = -29/5/(-2/5)
x = 29/2
x = 29/2
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