Answer:
x = -3
Step-by-step explanation:
Given:
12x - 9 = 10x - 15
Now, let's add 15 to both sides of the equation.
12x + 6 = 10x
Now, let's subtract 12x from both sides of the equation.
6 = -2x
Now, let's divide both sides by -2.
-3 = x
21 - 13.50= 7.50
so based on what your question is asking, Serena makes $7.50 more than Gabe per hour.
Answer:
x = 92
Step-by-step explanation:

I did big side over small side, proportions.
Cross Multiply.
39x = 3,588
divide by 39x
x = 92
Answer:
B.) Transitive Property of Congruency; If parallel lines have a transversal, then alternative interior angles are congruent.
Step-by-step explanation:
Alternate interior angles are the two angles that are inbetween the parallel lines but are on opposite sides of the transversal. Angles 4 and 5 are alternate interior, and therefore, they are congruent.