singletontrianna singletontrianna
  • 09-12-2019
  • Mathematics
contestada

Determine the value of y in the proportion 6y−10/5+7y=1/2 .

Respuesta :

gmany
gmany gmany
  • 09-12-2019

Answer:

y = 5

Step-by-step explanation:

[tex]\dfrac{6y-10}{5+7y}=\dfrac{1}{2}\qquad\text{cross multiply}\\\\(2)(6y-10)=(1)(5+7y)\qquad\text{use the distributive property}:\ a(b+c)=ab+ac\\\\(2)(6y)+(2)(-10)=5+7y\\\\12y-20=5+7y\qquad\text{add 20 to both sides}\\\\12y-20+20=5+20+7y\\\\12y=25+7y\qquad\text{subtract}\ 7y\ \text{from both sides}\\\\12y-7y=25+7y-7y\\\\5y=25\qquad\text{divide both sides by 5}\\\\\dfrac{5y}{5}=\dfrac{25}{5}\\\\y=5[/tex]

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