Firstly, we find that 2 * 3 = 6. Dividing 30 by 6, (ensuring that 6 goes in), we have 5. Since 5 is prime, 5 must be the missing prime factor.
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4 equals 2x2, 6 equals 2x3
If x = -7, then x3 = -343 so that 2x3 = -686 y = 2 then 15 y = 30 So 2x3 + 15y = -686 + 30 = -656
5-2x3=9
3x2 2x3 1x2x3 2x1x3 3x1x2 1x2x3
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