Question

Liliana solved the equation below. When she tried to verify her answer, she realized she made an error.

Answer 1

Answer:

Step 3 of substracting 6 from both sides.    

Step-by-step explanation:

We are given the following information in the question:

We are given the equation:

$\displaystyle\frac{1}{3}(x + 18) = 7$

Multiplying the constant term we get,

$\displaystyle\frac{1}{3}x + 6 = 7$

Subtracting 6 from both the sides we get,

$\displaystyle\frac{1}{3}x + 6-6 = 7-6\\\\\frac{1}{3}x = 1\\\\x = 3$

Liliana made a mistake in the step of subtracting 6 from both sides. She subtracted 6 from the left side bu added 6 on the right side instead of subtracting from the right side.

Answer 2

Answer:

B. The second step should be 1/3x + 6 - 6 = 7 - 6

Step-by-step explanation:

Liliana made the mistake of subtracting on one side and dividing on the other. When you do something to one side, you have to do the same thing to the other, hence it should be subtracting on both sides.