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3 years ago

The value of two numbers if their sum is 21 and their difference is 3

Mathematics

2 answers:

blsea [12.9K]3 years ago

8 0

Answer:

The numbers are: '12' and '9'

Step-by-step explanation:

Let the numbers be 'x' and 'y'

$x+y=21$ Equation:1

$x-y=3$ Equation:2

Finding the value of one variable from a equation and putting it in the other equation:

From equation:2

$x-y=3$

Adding 'y' both sides:

$x=3+y$ Equation:3

Put the 'x' in Equation:1

$x+y=21$

$(3+y)+y=21$

Adding the like terms:

$3+2y=21$

Subtracting '3' both sides:

$2y=21-3\\\\2y=18$

Dividing by '2' both sides:

$y=18/2\\\\y=9$

Put the value of 'y' in Equation:3

$x=3+y$

$x=3+9\\\\x=12$

The numbers are: '12' and '9'

iragen [17]3 years ago

6 0

Answer:

9 and 12

Step-by-step explanation:

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3 years ago

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Juli2301 [7.4K]

Answer:

Step-by-step explanation:

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For i.e:

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2 years ago

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Ilia_Sergeevich [38]

Answer:

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Step-by-step explanation:

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2 years ago

Put the equation in standard form.<br><br> y - 1 = -1/3 (x - 6)

Drupady [299]

Answer:

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Step-by-step explanation:

The equation of a line in standard form is

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Given

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Answer:

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Step-by-step explanation:

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