Answer:
4^x+2^2x=47
Step-by-step explanation:
4^x+2^2x+1=48
We move all terms to the left:
4^x+2^2x+1-(48)=0
We add all the numbers together, and all the variables
4^x+2^2x-47=0
We move all terms containing x to the left, all other terms to the right
4^x+2^2x=47
