20 + 2x + 12 + 2x + 8
40 + 4x
Answer:
-52/7 or 7 3/7
Step-by-step explanation:
-5 is also -35/7
2 3/7 is also 17/7
-35/7-17/7 = -52/7
-52/7 = 7 3/7
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➷ volume = length x width x height
In a cube, all sides are the same size
Substitute in the values:
volume = 6 x 6 x 6
Solve:
volume = 
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The answer is -17
The negative 7 and positive 7 add up to 0. They are opposites which cancel out. Think of it like being 7 dollars in debt (negative 7) and that debt is fully canceled out by the positive amount of money (positive 7). Put another way, the negative 7 means you go down 7 while the positive 7 means you go up 7.
After the first two terms cancel to 0, the -17 is the only thing left. Adding 0 to any number keeps that number the same.
