Answer:
a=-3/2
Step-by-step explanation:
12a+5-8a=-1
12a-8a+5=-1
4a+5=-1
4a=-1-5
4a=-6
a=-6/4
simplify
a=-3/2
Answer:
9
Step-by-step explanation:
First, we would set the number to x.
Then, we turn the words into an equation.
x+75 = 3x-39
Isolate the x.
-2x = -114
So...
x = 57
Answer:
135°
60°
75°
Step-by-step explanation:
hope this helps