Asum of money amounting to $4.25 consists of dimes and quarters if there are 26 coins in all how many are quarters

d= dimes

q = quarters

d+q=26 coins

 rewrite as d=26-q

0.25q +0.10d=4.25

0.25q+0.10(26-q)=4.25

0.25q+2.6-0.10q=4.25

0.15q=1.65

q=11

d=26-11=15

11*0.25 = 2.75, 15*0.10=1.50, 2.75+1.50=4.25

 there are 11 quarters

no, x cannot be the same number. in all of them, x is 1. for one input there is another output. g is not a function

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