Okay so can someone tell me If i’m solving this correctly? I did x=12*6 and got 72 & then I simplified it and got 8.48 so if it’s right would 8.48 be the answer and not 72?

Okay so can someone tell me If im solving this correctly I did x126 and got 72 amp then I simplified it and got 848 so if its right would 848 be the answer and class=