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5*x+4 = -4/9 // + -4/9
5*x-(-4/9)+4 = 0
5*x+4/9+4 = 0
5*x+40/9 = 0 // - 40/9
5*x = -40/9 // : 5
x = -40/9/5
x = -8/9
x = -8/9
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