8to the power of 2+9(12 divided by 3 x 2)-7
.

8^2+9(12/3*2)-7

8^2=8*8=64

12/3*2=4*2=8

9*8=72

64+72-7=136-7=129

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!