flamingolady flamingolady
  • 24-02-2016
  • Mathematics
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3 plus 6 times the number of white marbles for a total of 15

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EinsteinPoppell EinsteinPoppell
  • 24-02-2016
The problem is 3+6x = 15 with x being the number of white numbers.
Isolate variable by subtracting 3 on both sides:     6x = 12.
Isolate variable by dividing 6 on both sides:          x = 2
The number of white marbles is 2.
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