Steve is holding nickels and dimes in his hand. He has 4 more dimes than nickels. He has a total of 70 cents in his hand. How many nickels is he holding?
Let x be the number of nickels he is holding.
His nickels are worth 5 * x = 5x cents.
He has x+4 dimes.
The dimes are worth 10 * (x+4)
The total worth of the nickels and dimes is 5x + 10*(x+4) = 70.
5x + 10x + 40 = 70
15x = 30
x = 
<gadget id="calculator">2</gadget>
<output>2</output>
2, Steve has 2 nickels in his hand.

<result>2</result>