Respuesta :
so you add 10 nickels and then add the rest of the dimes
(10 + x)$.05 + $.10x = $3.50.
$.50 + $.05x + $.10x = $3.50.
$(.05 + .10)x = $(3.50 - .50).
$.15x = $3.00.
x = $3.00/$.15.
x = 20 dimes
So (20 + 10) nickels.
$.50 + $.05x + $.10x = $3.50.
$(.05 + .10)x = $(3.50 - .50).
$.15x = $3.00.
x = $3.00/$.15.
x = 20 dimes
So (20 + 10) nickels.