Answer:
n=4
Explanation:
AB+BC=AC
2n-1+4n+5=10n-12
Step 1: Simplify both sides of the equation.
2n−1+4n+5=10n−12
2n+−1+4n+5=10n+−12
(2n+4n)+(−1+5)=10n−12(Combine Like Terms)
6n+4=10n−12
6n+4=10n−12
Step 2: Subtract 10n from both sides.
6n+4−10n=10n−12−10n
−4n+4=−12
Step 3: Subtract 4 from both sides.
−4n+4−4=−12−4
−4n=−16
Step 4: Divide both sides by -4.
-4/4N= -16/4
-n= -4
n=4