Is a solution to 3-X= 4 a solution to 12 = 9 - 3x also? Choose the answer with the correct answer and explanation

Question and answers are in the attached picture. you so much in advance.

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line