elizabeth0705
elizabeth0705 elizabeth0705
  • 10-03-2020
  • Mathematics
contestada

If f(x) = 6x – 2 and g(x)= –3x+7, then for what value of x is f(x) = g(x)?

Respuesta :

frika
frika frika
  • 18-03-2020

Answer:

[tex]x=1[/tex]

Step-by-step explanation:

If [tex]f(x)=6x-2[/tex] and [tex]g(x)=-3x+7,[/tex] then the equation

[tex]f(x)=g(x)[/tex]

is equivalent to the equation

[tex]6x-2=-3x+7[/tex]

Add [tex]3x[/tex] to both sides of the equation:

[tex]6x-2+3x=-3x+7+3x\\ \\(6x+3x)-2=(-3x+3x)+7\\ \\9x-2=7[/tex]

Add 2 to both sides of the equation:

[tex]9x-2+2=7+2\\ \\9x=9[/tex]

Divide by 9:

[tex]x=1[/tex]

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