Question 661837
x = dimes
y = nickels
x+y=46
3.40=(.1x+.05y)-(.1(5)) - (.05(2))
3.40 = .1x + .05y - .6
4 = .1x + .05y
given x = 46 - y
substitute into the equation
4 = .1(46-y) + .05y
distribute the .1
4 = 4.6 - .1y + .05y
4 = 4.6 - .05y
.05y = 4.6 - 4
.05y = .6
y = 12 nickels
x = 46 - 12 = 34 dimes