(x-30)-1/2(x-30)=85

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Solution for (x-30)-1/2(x-30)=85 equation: 


x in (-oo:+oo)

x-((1/2)*(x-30))-30 = 85 // - 85

x-((1/2)*(x-30))-85-30 = 0

(-1/2)*(x-30)+x-85-30 = 0

x-1/2*(x-30)-85-30 = 0

x-1/2*(x-30)-85-30 = 0

1/2*x-85-30+15 = 0

1/2*x-70-30 = 0

1/2*x-100 = 0

1/2*x-100 = 0

1/2*x-100 = 0 // + 100

1/2*x = 100 // : 1/2

x = 100/1/2

x = 200

x = 200

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