3 years ago

What is x? in the equation x-21=6

Mathematics

2 answers:

Paul [167]3 years ago

8 0

Answer:

Step-by-step explanation:

You would turn the equation around, so it is 21+6=27 and checking, 27-21=6

Phoenix [80]3 years ago

7 0

Answer:

x = 27

Step-by-step explanation:

x- 21 = 6

add 21 to both sides:

x = 27

Check your work by substitution:

27 - 21 = 6

6= 6

x = 27

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n a jar of coins, the ratio of nickels to dimes is 5:7. If the jar contains 350 dimes, how many nickels are there?

irina1246 [14]

Answer:

250 nickles

Step-by-step explanation:

Nickles and dimes are coins with different currency values. One nickel(N) is equal to 5 cents while one dime(D) is equal to 10 cents. The ratio of nickel:dime is 5:7, to put into the equation it will be:

N/D= 5/7

7N=5D ---> 1st equation

There are 350 dimes, the equation will be:

D=350 ----> 2nd equation

We can find out the number of nickels by substitute the 2nd equation into the first. The calculation will be

7N=5D

N= 5D/7

N=5(350)/7

N= 250

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Step-by-step explanation:

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Alex777 [14]

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Step-by-step explanation:

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3 years ago

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Drupady [299]

Answer:

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Step-by-step explanation:

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2 years ago

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snow_lady [41]

Answer:

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Step-by-step explanation:

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7 0

4 years ago

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