Question

Which of the following equations have the correct solution Select all that apply. a. 3x + 7 = 10; x = -1 b. 5(x + 4) - x = 40; x = 5 c. 3 = 3; x = 12 d. 9 = 7x -9; x = 0 e. 7 = 5x +5; x = 6

Answer 1

b. 5(x+4) -x = 40

Explanation:

x=5

5(5+4) -x = 40

5(9) - 5 = 40

45 -5 = 40

40 = 40