i have 8 coins in my pocket all are either nickles or dimes. they total 70 cents how many nickels and how many dimes do i have?

there are 28 members of the co-ed flag football team, this icludes 6 more boys than girls. how many boys and how many girls are there on the team.

D = 8 - N

10D + 5N = 70 = 10(8-N) + 5N = 80 - 5N

80 - 5N = 70

-5N = -10

N = 2
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B = G+6

B + G = (G+6) + G = 28

Continue from there.