B. Add -12x to both sides. Then divide all terms by -2. The positive 12 on the right side will be a -6 and the -42 will be a positive 21. The inequality sign is always switched whenever the equation is divided by a negative number.
Answer:
x = 15/7
Step-by-step explanation:
-7x - 3 = 12
-7x = 12 + 3
-7x = 15
x = 15/7
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B. Slope is rise over run
Given :
A rectangle with a length of 3 x and height of x. If Kyle uses 18 feet of wood to make the frame.
To Find :
The length of the frame.
Solution :
We know, perimeter of the rectangle is given by :

Now, it is given that 18 feet of wood is used.
So,

Therefore, length of frame is given by 3x = 6.75 feet.
Hence, this is the required solution.