Elouise12 Elouise12
  • 16-03-2017
  • Mathematics
contestada

If (x+5) -2(4x-1)=0, what is the value of x?

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VampireJellyfish
VampireJellyfish VampireJellyfish
  • 16-03-2017
Expand the brackets: x + 5 - 8x + 2 = 0
The 8x is obtained from -2 x 4x, and the +2 is obtained from the -2 x -1
Collect all the x's and numbers to give you 7 - 7x = 0
Move the 7x to the right by adding 7x to both sides: 7 = 7x
Divide both sides by 7:
1 = x

Answer Link
kelle1205
kelle1205 kelle1205
  • 16-03-2017
(x+5) - 2(4x-1) = 0
x+5 - 8x +2=0
-7x = -5
x = 5/7
Answer Link

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