Step-by-step explanation:

1÷4a+20=60
1÷4a=4
a=1/160
The answer to this question would b:
=5x−9
Answer:
2341.
Step-by-step explanation:
Assuming the question is 45x - 334x = 212
Then the answer is:
45x - 334x = 212
-289x = 212
x = -(212 / 289)
OR
x = -0.73
Exponent rule : a^-x = 1/a^x
x^-9 * x^-2 =
1/x^9 * 1/x^2 = (when multiplying exponents with same base, add exponents)
1/x^(9 + 2) =
1/x^11