5. 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.

Question

Mathematics

Trevin Everett

13 November, 03:12

5. 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.

+4

Answers (1)

Know the Answer?

Delaney Gilmore · Answer 1

4 (x+3) = 7

The mistake is with his final answer, he wrote down 4x=1.

When you do 4 (x) 4 (3), the answer is completely different from what Andre said. He did wrong calculations.

4x3=12

7-12 = - 5

Which means it should be 4x=-5 as the final answer.