mumladzel258 mumladzel258
  • 07-06-2020
  • Mathematics
contestada

(2 x + 1):15=(x-1):7​

Respuesta :

ulziinamuun14 ulziinamuun14
  • 07-06-2020
(2 x + 1):15=(x-1):7
7(2x+1)=15(x-1)
14x+7=15x-15
14x-15x=-15-7
-x=-22
x=22
Answer Link
yohanna69
yohanna69 yohanna69
  • 07-06-2020

Answer:

x=22

Step-by-step explanation:

They are put in ratio form so

[tex] \frac{2x + 1}{15} = \frac{x - 1}{7} [/tex]

so crisscross them

7 (2x+1)=15 (x-1)

14x+7=15x-15(collect the like terms)

14x-15x=-15-7

-x=-22 (divide both sides by -1 to find x)

x=22

Answer Link

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