anonymous
  • anonymous
16x – 3(4x + 7) = 6x –(2x + 21)what does x=?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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bahrom7893
  • bahrom7893
multiply out the parenthesis: 16x - 12x - 21 = 6x - 2x - 21 Add 21 to both sides: 16x - 12x = 6x - 2x Move all x's to one side: 16x - 12x - 2x - 6x = 0 x = 0.. are u sure the question is right?
anonymous
  • anonymous
yes but it just doesnt make sense right!!!!!
bahrom7893
  • bahrom7893
yeah.. but that is the right answer, x = 0

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bahrom7893
  • bahrom7893
Please click on become a fan if I helped, I really want to get to the next level!! Thanks =)
anonymous
  • anonymous
x=1
anonymous
  • anonymous
how
anonymous
  • anonymous
I'm wrong but it end up being 1=1
anonymous
  • anonymous
no oi just tried it and your right
anonymous
  • anonymous
4x=4x so that means 4/4 =x/x which means 1=1
anonymous
  • anonymous
or x=x
anonymous
  • anonymous
Solve the system of equations using elimination. x-3y=-4 and 2x+6y=5
anonymous
  • anonymous
Which means you can plug in any value for x and the equation holds true
anonymous
  • anonymous
and how did u get it
anonymous
  • anonymous
how did i get what?...
bahrom7893
  • bahrom7893
for the first equation there are infinite number of solutions.. it's not just 0 or 1
bahrom7893
  • bahrom7893
x-3y=-4 2x+6y=5 x = -4 + 3y 2(-4+3y)+6y = 5
anonymous
  • anonymous
yeah thats why i said you can plug in any value for x and the equation holds true
bahrom7893
  • bahrom7893
sorry didnt see that..
anonymous
  • anonymous
its all good
bahrom7893
  • bahrom7893
x = -4 + 3y 2(-4+3y)+6y = 5 x = -4 + 3y -8 + 6y + 6y = 5
bahrom7893
  • bahrom7893
x = -4 + 3y 12y = 13 x = -4+3y y = 13/12
bahrom7893
  • bahrom7893
x = -4+3y y = 13/12 x = -4 + 13/4 = -16/4 + 13/4 = -3/4 y = 13/12

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