rin001
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Andre is solving the equation 4(x + 3) = 7. He says,"I can subtract from each side to get
4x = 1 and then divide by 4 to get x = "Kiran says, "I think you made a mistake."

a. How can Kiran know for sure that Andre's
solution is incorrect?

b. Describe Andre's error and explain how to
correct his work.

Respuesta :

stapmoshun

Answer:

Step-by-step explanation:

Kiran can know for sure that it is incorrect by substituting x with 1/4

Solving for the equation gives 4(1/4 + 3) = 7
distributing gives 1 + 3 = 7
obviously this is incorrect

b)
Andre's error is that he didnt distribute 7
Distributing 7 results in
4x + 12 = 7
then subtracting 12 from both sides
4x = -5
x = -5/4

consumed44

Answer:

x=-1.25

Step-by-step explanation:

well he was wrong about the 4x = 1.

4(x+3)=7

4x+12=7    1. - 12 on both sides

4x=-5   2. 4 on both sides

x=-1.25

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