Answer:
-15
Step-by-step explanation:
Isolate x to solve
-9=6+x
-6 -6
-15=x
1) to solve for x we need to isolate it
We can isolate x by bringing 6 to the left(changing the sixes spot will make it negative)
So
-9-6=x
Hope this helps!
n =
7(n - 6) = a(n + 5)
7n - 42 = an + 5a
7n - an = 5a + 42
n( 7 - a ) = 5a + 42