Answer:
25x+300=y
Step-by-step explanation:
12-{16-(5×2)}²
12-(16-10)²
12-(6)²
12-36
(-24)
-1 x
Hope this helps
x=-2500
the number 9
it is never being changed unlike the other terms because they are being directly multiplied by the variable x. but no matter what 9 stays the same.