The difference of 5 times a number and 8 is 27 which equation below can be used to find the unknown number

5x-8=27

Step-by-step explanation:

If this is what you are looking for what you do is you go based off what it says. So it says the difference, what you do is you minus 5 and 8. But the 5 has times in front of it. So it will be 5x.

5x-8, then it says is 27, that means it is equal to 27.

5x-8=27.

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.  

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752