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Anonymous
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To determine how many 2s go into 30, you divide 30 by 2. The calculation is 30 ÷ 2 = 15. Therefore, there are 15 twos in 30.
If you mean: -4+3+2s = 15 then s = 8
2s2-s-15 = (2s+5)(s-3)
310.
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