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2*x+4 = -x-5/2 // + -x-5/2
2*x+x-(-5/2)+4 = 0
2*x+x+5/2+4 = 0
3*x+13/2 = 0 // - 13/2
3*x = -13/2 // : 3
x = -13/2/3
x = -13/6
x = -13/6
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