- 9 + 8y + 12 – ( - 2y) + 1 ?

Step-by-step explanation:

We begin with the given equation

First, we need to remove the parenthesis. Subtracting a negative value is the same as adding, so we can rewrite this as

Now, we need to add like terms. This means that we need to add the regular numbers together and then all of the numbers with y together

And there is our simplified expression

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