Question 160051
#1=X
#2=x-1
#3=x-1-5=x-6

X=2(X-6)

Use the distributive property
x=2x-12

subtract 2x from both sides

-x=-12

x=12

#1=12
#2=11
#3=6

Let's plug in the values to check our answer

12=2(6)
12=12