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x in (-oo:+oo)
x-((2.5/100)*x) = 51187500 // - 51187500
x-((2.5/100)*x)-51187500 = 0
x-0.025*x-51187500 = 0
0.975*x-51187500 = 0 // + 51187500
0.975*x = 51187500 // : 0.975
x = 51187500/0.975
x = 52500000
x = 52500000
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