John has four more nickels than dimes in his pocket, for a total of $1.25. Which equation could be used to determine the number of dimes, 𝑥 , in his pocket?

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Answer 1 · 2018-06-14T20:36:06

$0.05 * (4 + x) + 0.10 * x = 1.25$

$((n = 4 + x),(0.05 * n + 0.10 * x = 1.25))$

$0.05 * (4 + x) + 0.10 * x = 1.25$

Times 20

$4 + x + 2x = 25$

$3x = 21$

$x = 7$

$n = 4 + 7 = 11$