SOLUTION: Solve by substitution; ND + NQ = 20, 2ND - NQ =25

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Question 1190818: Solve by substitution;
ND + NQ = 20,
2ND - NQ =25
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
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Solve by substitution;
ND + NQ = 20,
2ND - NQ =25
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system%28NQ=20-ND%2Cand%2CNQ=2ND-25%29

20-ND=2ND-25
20%2B25=2ND%2BND
45=3ND
ND=15
and you can use this ,....