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brilliants [131]
3 years ago
9

15x+6=10x+21 solve for x

Mathematics
2 answers:
VMariaS [17]3 years ago
8 0
The answer would be x = 3.

15x = 10x + 21 - 6 (Subtract 6 from both sides)

15x = 10x + 15 (Simplify 10x + 21 - 6 to 10x + 15)

15x - 10x = 15 ( Subtract 10x from both sides)

5x = 15 ( Simplify 15x - 10x to 5x )

x = 15/5 ( Divide both sides by 5 )

x = 3 ( Simplify 15/5 to 3 ).
scoundrel [369]3 years ago
4 0

he answer would be x = 3.


15x = 10x + 21 - 6 (Subtract 6 from both sides)


15x = 10x + 15 (Simplify 10x + 21 - 6 to 10x + 15)


15x - 10x = 15 ( Subtract 10x from both sides)


5x = 15 ( Simplify 15x - 10x to 5x )


x = 15/5 ( Divide both sides by 5 )


x = 3 ( Simplify 15/5 to 3 ).


Read more on Brainly.com - brainly.com/question/2315247#readmore

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A rectangular picture frame has a length that is 6 cm greater than the width. The total perimeter is 36
Elan Coil [88]

Answer:

Step-by-step explanation:

width= x

length= x+6

perimter  = 2x+ 2(x+6)

36= 2x+ 2x+ 12

36= 4x + 12

36-12= 4x

4x= 24

x= 6

therefore width= 6cm

length= 6+6 = 12

3 0
3 years ago
se quiere pintar una pared en forma de hexágono regular y se sabe que cada lado mide 3m y que su apotema es de 2,8m ¿cual es el
Debora [2.8K]

Answer:

16.8 metros cuadrados.

Step-by-step explanation:

Dado que se quiere pintar una pared en forma de hexágono regular y se sabe que cada lado mide 3m y que su apotema es de 2,8m, y que el área de un hexágono es igual al perímetro multiplicado por la apotema, y dicho resultado dividido por 2, para determinar cuál es el área que se va a pintar se debe realizar el siguiente calculo:

((6x3) x 2.8) / 2 = X

(12 x 2.8) / 2 = X

33.6 / 2 = X

16.8 = X

Así, el área que se va a pintar es de 16.8 m2.

3 0
3 years ago
A municipal electrical utility charges customers a $15 per month fee plus 12 cents per kilowatt-hour of energy used. Write an eq
ale4655 [162]

Answer:

C(x) = 15 + 12 * x

Step-by-step explanation:

Cost = monthly fee plus cost per hour * hours

C(x) = 15 + 12 * x

8 0
3 years ago
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Eddi Din [679]

Answer:

9.82 feet

Step-by-step explanation:

the perimeter of the window is the circumference of a semi-circle with a diameter of 5

P = (πd)/2     (divided in half because it's only half a circle)

P ≈ 3.14(3.5) which is approx 11

11 is closest to 9.82

6 0
3 years ago
Read 2 more answers
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Lisa [10]
40c=520
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Hope this helps!
6 0
4 years ago
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