Make a system of equations.


Plug in 2d for 'q' in the first equation:


Multiply:

Combine like terms:

Divide 0.60 to both sides:

Now plug this into any of the two equations to find 'q':



So she has 10 dimes and 20 quarters.
5/6=1/3+(3/6). 3/6 is the correct answer
Answer is D.x=9
5x+3+6x+5+8x+1=180
now solve for 'x'
Hope this help