Question

7 Describe the error in solving the equation

(1) 3 (X + 4) = 13
(2) 3x + 4 =13
(3) 3 x = 9
(14)X = 3

Answer 1

Answer: The error was at the first step since 4 was never multiplied by 3, therefore the final answer would be incorrect.

Step-by-step explanation: 3(x + 4) = 13

multiply 3 by everything in the parenthesis, so

3x + 12 = 13

subtract 12 from each side.

3x = 1

divide both sides by 3

x = 1/3 = 0.33

Answer 2

(2) The 3 was not distributed correctly.

3(x + 4) is the same as 3(x) + 3(4) Which is 3x + 12 not 3x + 4

Explanation: