- #1
MadmanMurray
- 76
- 0
1. Find value of x if:
4x-1 = 1/32
3. I know that both 4 and 1/32 can be expressed as powers of 2 so (22)x-1 = 2-5
Heres what I am not quite sure about
Im just assuming that I multiply that -1 by the power inside the brackets but I am not sure if that's right. Anyhow here's what i got
22x-2 = 2-5
I then eliminated the 2s so I am left with 2x-2 = -5.
doing that in my head I get x = -3/2
plugging that into the equation doesn't work unfortunately.
4x-1 = 1/32
3. I know that both 4 and 1/32 can be expressed as powers of 2 so (22)x-1 = 2-5
Heres what I am not quite sure about
Im just assuming that I multiply that -1 by the power inside the brackets but I am not sure if that's right. Anyhow here's what i got
22x-2 = 2-5
I then eliminated the 2s so I am left with 2x-2 = -5.
doing that in my head I get x = -3/2
plugging that into the equation doesn't work unfortunately.