We want to add something to the right side of the equation to get 81.
x^2 - 18x + 81 = 23
The final step is to factor and subtract 23. (Subtracting 23 is a unnecessary, but whatever)
(x - 9)^2 - 23 = 0
So "x" = 9 + sqrt23
After converting to common denominator:
8/18, 7/18, 6/18, 5/18
so the next fraction is 4/18, but if you have to simplify it’s 2/9
<span>1/(xy)^1 = x^-1y^-1
1/a^4 = a^-4
1/8^6 = 8^-6
5/x^2 = 5x^-2</span>
I dont know if this is right BUT
X-15=5(3q-10)-5q
X-15=15q-50-5q
X-15=10q-50
+15 +15
X=10q-35