(x-30)+(2x-120)+(1/2x+15)=180

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Solution for (x-30)+(2x-120)+(1/2x+15)=180 equation: 


x in (-oo:+oo)

x+2*x+(1/2)*x-120-30+15 = 180 // - 180

x+2*x+(1/2)*x-180-120-30+15 = 0

7/2*x-315 = 0 // + 315

7/2*x = 315 // : 7/2

x = 315/7/2

x = 90

x = 90

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