42=1/2(120-x)

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Solution for 42=1/2(120-x) equation: 


x in (-oo:+oo)

42 = (1/2)*(120-x) // - (1/2)*(120-x)

42-((1/2)*(120-x)) = 0

(-1/2)*(120-x)+42 = 0

42-1/2*(120-x) = 0

42-1/2*(120-x) = 0

1/2*x-18 = 0

1/2*x-18 = 0

1/2*x-18 = 0 // + 18

1/2*x = 18 // : 1/2

x = 18/1/2

x = 36

x = 36

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