If signs are different you subtract. So 2.5- -1.25 equals 1.25 and keep the sign of the biggest number
3 - 4x= -89 is the equation i hope it's right
Answer:

Step-by-step explanation:
Using the rule of exponents
=
, then
=
= 
1 hours is equal to 60 minutes.
2 hours = 120 minutes
40% is 120 minutes = 120*40/100 = 48 minutes