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(-2/3)*x+4*x-(4/9) = 56/9 // - 56/9
(-2/3)*x+4*x-(4/9)-(56/9) = 0
(-2/3)*x+4*x-4/9-56/9 = 0
10/3*x-20/3 = 0 // + 20/3
10/3*x = 20/3 // : 10/3
x = 20/3/10/3
x = 2
x = 2
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