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andreyandreev [35.5K]
3 years ago
14

Please help!! Sally has $4.60 change in her pocket. she has only 20 cents and 50 cent coins, 14 coins in total. If t is the numb

er of 20c coins that sally has, find t.
Mathematics
1 answer:
ivolga24 [154]3 years ago
5 0

Answer:

8

Step-by-step explanation:

4.60=0.2t+0.5f

t=20 cent coins

f=fifty cent coins

t+f=14

multiply the second equation by 0.5 to eliminate the f and subtract one equation from another.

    4.60=0.2t+0.5f

   -(7      =0.5t+0.5f)

-------------------------------

    -2.4= -0.3t

multiply both sides by -0.3 to get 8=t. That's the # of 20 cent coins.

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