shanteJ shanteJ

23-09-2016
Mathematics

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3 times a number plus 12 minus 5 times the same number is 22

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bennyvym bennyvym

23-09-2016

(3x+12)-5x=22
-15x^2-60x=22
-15x^2-60x-22=0
x=-b/2a
x=60/-30
x=-2

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