Answer:
4x+y add like terms ... -5+9=4 and -y(or -1)+2y=y
Write a system of equations and solve.
x + y = 10
5x + 10y = 90
Multiply and combine equations
-5x - 5y = -50
5x + 10y = 90
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5y = 40
y = 8
x = 2
There are 2 nickels and 8 dimes in the jar. Hope this helps! :)
(x,y)=(64/81, 70/81) I can provide a description if needed. I used the process of elimination.
