Answer:
Idk lol
Step-by-step explanation:
11 = w - 12
11 + 12 = w -12 + 12
w = 11 + 12
w = 23
10x+20y=540
x+y=34
y=34-x
Plug in (34-x) for y:
10x+20(34-x)=540
10x+680-20x=540
-10x=-140
10x=140
x=14
There were 14 ten cent coins and 20 20 cent coins
Step-by-step explanation:
I hope this is right, I used demos