Answer:
-56
Step-by-step explanation:
Isolate the a. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
First, add 9 to both sides
-a/4 - 9 (+9) = 5 (+9)
-a/4 = 5 + 9
-a/4 = 14
Next, multiply 4 to both sides
(-a/4)(4) = (14)(4)
-a = 56
Finally, isolate the a. Divide -1 from both sides
(-a)/-1 = (56)/-1
a = 56/-1
a = -56
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