marievee4Marista marievee4Marista
  • 01-03-2017
  • Mathematics
contestada

Which equation has solution x = -3?

A) 2x - 7 = -1
B) 3x + 8 = 1
C) 1/2 x + 8 = 10
D) 1/2 (2x - 6) = -6

Respuesta :

morgeron
morgeron morgeron
  • 01-03-2017
A) 2(-3) - 7 = -1          B) 3(-3) + 8 = 1          
       -6 - 7 = -1                  -9 + 8 = 1
         -13 = -1                        -1 = 1

C) 1/2(-3) + 8 = 10          D) 1/2 (2(-3) - 6) = -6
     -1.5 + 8 = 10                      1/2 ( -12) = -6
       6.5 = 10                                -6 = -6

D is the answer

Answer Link
Palwandew Palwandew
  • 06-03-2017
if you put x = -3 in these options, only option D gets the required answer. So option D is correct.

Answer Link

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