x/2+100=400 - solution

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Solution for x/2+100=400 equation:

x in (-oo:+oo)

x/2+100 = 400 // - 400

x/2-400+100 = 0

1/2*x-300 = 0 // + 300

1/2*x = 300 // : 1/2

x = 300/1/2

x = 600

x = 600

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