For number one I would model it like this:
16 = 2s
For number two just do it like this:
.7A - 4A + 5 = -8
-3.3A + 5 = -8
-3.3A = -13
A = 3.9 (approximately)
For number three just remember that a square has for sides so you would just multiply one side length times 4 and set it equal to the whole like this:
4(3x+4) = 76
12x + 16 = 76
12x = 60
x = 5
For number four we'll use "t" to represent the total:
4 (25) + (16*3) = t
100 + 48 = t
148 = t
For number five just distribute and so on:
1/4B - 4 = 7
1/4B = 11
B = 44
I hope that helps as well! :D
- mathwizzard3
