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(2/5)*x+(3/5)*x+x+x+30 = 360 // - 360
(2/5)*x+(3/5)*x+x+x-360+30 = 0
3*x-330 = 0 // + 330
3*x = 330 // : 3
x = 330/3
x = 110
x = 110
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