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@abb0t @timo86m @AgentZero help guys!
i have this so far: N=d +5 as an equation but idk what to do or if im right :C
I know its 7 dimes and 12 nickels but idk how though?
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7x(.10) + 12x(.05) = $1.30 i know this is what im suppose to do but where did the 7 and 12 come from?
let me dbl check mines :D
did you delete one of your posts?
Naw why? 0_o & i get that but how do you ended up with 7 & 12 like how though i know all the plug in stuff and eqution i just dont get why its 7 & 12 besides thats it shows it has 5 more nickels
5 more nickels than dimes
the 2 above by definition
x =5+ y
^ 5 more and we assume y is number of nickels
I got it now :D
First step is to clean it up
d=.1 eq 2
x =5+ y eq 3
xn+yd=1.3 eq 4
we plug in n and d to the 4th equation
x*.05+y*.1=1.3 eq 5
then we plug in eq 3 into eq 5
.25+.05y + .1y =1.3 distributed the .05 then rearange y*.1 to .1y
.25+.15y=1.3 add like terms the ys in this case
.15y=1.05 subtract .25 from both sides
y= 7 divide both sides by .15
now you have y=7 one of the answers
use eq 3
x =5+ y
x=5+7 and x = 12