chris6966 chris6966
  • 24-01-2020
  • Mathematics
contestada

What is the value of x in the equation 3х - 4 y = 65 when y=42

Respuesta :

gmany
gmany gmany
  • 24-01-2020

Answer:

[tex]\large\boxed{x=\dfrac{233}{3}=77\dfrac{2}{3}}[/tex]

Step-by-step explanation:

[tex]3x-4y=65\\\\\text{Put}\ y=42\ \text{to the equation and solve for }\ x:\\\\3x-4(42)=65\\\\3x-168=65\qquad\text{add 168 to both sides}\\\\3x-168+168=65+168\\\\3x=233\qquad\text{divide both sides by 3}\\\\\dfrac{3x}{3}=\dfrac{233}{3}\\\\x=\dfrac{233}{3}[/tex]

Answer Link
texaschic101
texaschic101 texaschic101
  • 24-01-2020

Answer:

Step-by-step explanation:

3x - 4y = 65......when y = 42....so sub in 42 for y

3x - 4(42) = 65

3x - 168 = 65

3x = 65 + 168

3x = 233

x = 233/3 or 77 2/3

Answer Link

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