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(-1/3)*x+5/7 = 37/189-x // - 37/189-x
(-1/3)*x+x+5/7-(37/189) = 0
(-1/3)*x+x+5/7-37/189 = 0
2/3*x+14/27 = 0 // - 14/27
2/3*x = -14/27 // : 2/3
x = -14/27/2/3
x = -7/9
x = -7/9
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