Answer:
Step-by-step explanation:
2(3x-1)+2(6)
6x-2+12
6x+10
I can't understand what you wanted with the second question (or if that is even a question), but the answer to the first one is 42.
Step-by-step explanation:
The area is

Since the width is

Then, the length will be

46.
3x + y = 2x +y
X+y=y
X= 0
3x + y + 2x +y = 4x+10
2y+x= 10
Y=5
Step 1 remove paranthesis
(-30a-105)=-15
Step 2: Move constant to RHS (take not negative sign is removed if sides are changed and vice versa)
-30a=-15+105
-30a=90
Step 3: Simplify
-a=3
Step 4: remove negative sign from variable
a=3