7=100x/300

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Solution for 7=100x/300 equation: 


x in (-oo:+oo)

7 = (100*x)/300 // - (100*x)/300

7-((100*x)/300) = 0

(-1/3)*x+7 = 0

7-1/3*x = 0 // - 7

-1/3*x = -7 // : -1/3

x = -7/(-1/3)

x = 21

x = 21

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