Question

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step by step explanation
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Answer 1

1$=60 2$=80 3$=20

Step-by-step explanation:

Let no of 1$ COIN=x

2$=y

5$=z

Total coins=160

ATQ

x=3z

Amount=300

300=2x +3y +5z

300=6z+3y+5z

300=11z + 3y

Second equation

Total coins=X+y+z

160=3z+y+z

160=4z+y

Solving both eq by elimination method

-20=-1z

Z=20

X=60

Y=80