7. Refer to the figure at the right. (3x + 3)
a. Find x so that the l || m. x =
b. Using the value you found in part a, determine
whether the lines and d are parallel. Yes/No:

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.