All categories

2 years ago

A number is greater than another number by 5. if their sum is 21, find the number

Mathematics

2 answers:

DochEvi [55]2 years ago

6 0

Answer:

x=13

y=8

Step-by-step explanation:

let the greater number be x and the smaller number be y.

Now,

from first condition,

x = y + 5 --------1

from second condition,

x + y = 21

or, x = 21 - y --------2

from equation 1 and 2,

y + 5 = 21 - y

or, 2y = 16

y = 8

now,

putting the value of y in equation 1

x = 8 + 5

= 13

Flura [38]2 years ago

5 0

Answer:

13.

Step-by-step explanation:

x+x+5=21

2x+5=21

2x=16

x=8

You might be interested in

What is the solution to this equation pls pls pls x(at the power of 2) = 6 + 9x

kati45 [8]

Answer:

The solution to the equation are x = 5.089 and x = -0.589

Step-by-step explanation:

Given:

x(at the power of 2) = 6 + 9x

To Find:

The solution of the equation = ?

Solution:

The given equation can be written as

=> $2x^2 = 6+9x$

=> $2x^2-6 -9x=0$

=> $2x^2-9x-6=0$

Using the quadratic formula,

$x = \frac{-b\pm \sqrt{(b^2 -4ac}}{2a}$

where

a= 2

b = -9

c = -6

Substituting these values,

$x = \frac{-(-9)\pm \sqrt{(-9)^2 -4(2)(-6)}}{2(2)}$

$x = \frac{-(-9)\pm \sqrt{(81) -4(-12)}}{2(2)}$

$x = \frac{-(-9)\pm \sqrt{81+48}}{4}$

$x = \frac{-(-9)\pm \sqrt{129}}{4}$

$x = \frac{-(-9)\pm 11.357}{4}$

$x = \frac{9 \pm 11.357}{4}$

$x = \frac{9 + 11.357}{4}$ $x = \frac{9 - 11.357}{4}$

$x = \frac{20.357}{4}$ $x = \frac{-2.357}{4}$

x =5.089 x = -0.589

6 0

2 years ago

Find the size of angle x

madam [21]

Answer:

X=180-124

X=56

Bpwxjpwxjwxwx

8 0

2 years ago

Read 2 more answers

Many years ago, the towns of Franklin and Chester agreed to begin posting their populations on signs just outside of their towns

iVinArrow [24]

Answer:

The answer is 9

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

TWO MINUTES HURRY HELP ME PLEASE

Elis [28]

Answer:

x=-1

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

1/4÷2 summary model number

masya89 [10]

If I was to just divide it I would say it is 1/8

8 0

2 years ago

Read 2 more answers

A number is greater than another number by 5. if their sum is 21, find the number​

A number is greater than another number by 5. if their sum is 21, find the number