KatlynTomi KatlynTomi

03-09-2022
Mathematics

contestada

Solve 14−2x=28 using the replacement set {−21, −7, 7} .
A. −21
B. −7
C. 7
D. I don't know.

Respuesta :

jimrgrant1 jimrgrant1

03-09-2022

Answer:

B

Step-by-step explanation:

substitute the values from the replacement set into the left side of the equation to find which values of x make it true.

x = - 21

14 - 2(- 21) = 14 + 42 = 56 ≠ 28 ← False

x = - 7

14 - 2(- 7) = 14 + 14 = 28 ← True

x = 7

14 - 2(7) = 14 - 14 = 0 ≠ 28 ← False

Thus x = - 7 is the solution

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mromero91335 mromero91335

14-09-2022

Answer: the answerd is B

explanation: i take the Test A in k12

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