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3 years ago

I think this is the hardest question But if you solve this you will get 500+ points

Mathematics

2 answers:

elixir [45]3 years ago

8 0

Answer:

Step-by-step explanation:

Let the number of 20cent coins be 'x'

Then, 10cent coins are 'x + 12'

Total amount = $5.4 = 540 cents

20(x) + 10(x + 12) = 540

20x + 10x + 120 = 540

30x = 540 - 120

30x = 420

x = 420/30

x = 14 (14 20cent coins)

x + 12 = 26 (26 10cent coins)

Total coins = 14 + 26 = 40

BRAINLIST

Step-by-step explanation:

blondinia [14]3 years ago

6 0

Answer:

Step-by-step explanation:

Let the number of 20cent coins be 'x'

Then, 10cent coins are 'x + 12'

Total amount = $5.4 = 540 cents

20(x) + 10(x + 12) = 540

20x + 10x + 120 = 540

30x = 540 - 120

30x = 420

x = 420/30

x = 14 (14 20cent coins)

x + 12 = 26 (26 10cent coins)

Total coins = 14 + 26 = 40

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer: The cost of one sandwich is $4.25 and the cost of one cup of coffee is $2.25.

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Let x be the cost of one sandwich and y be the cost of one cup of coffee.

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