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x in (-oo:+oo)
x/3+129+147.7 = 150 // - 150
x/3-150+129+147.7 = 0
1/3*x+126.7 = 0 // - 126.7
1/3*x = -126.7 // : 1/3
x = -126.7/1/3
x = -380.1000038
x = -380.1000038
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