Answer:
-16
Step-by-step explanation:
You don't know the number that 12 is multiplied by, so substitute x for it in the equation. then you get 12x = -192 (it has a product of -192, so you can set up an equation). Then solve for x. Divide both sides by 12, and you get x = -16, thus giving the answer to your question.
Answer: -4/15
Step-by-step explanation:
Answer:
6 inches
Step-by-step explanation:
Answer:
51 DVDs
Step-by-step explanation:
Let the number of DVDs and CDs sold be x each.
<u>Initial</u>
Number of DVDs= 86
Number of CDs= 52
<u>After selling</u>
Number of DVDs= 86 -x
Number of CDs= 52 -x
Given that there are 3 times as many DVDs than CDs left,
86 -x= 3(52 -x)
<em>Expand:</em>
86 -x= 156 -3x
<em>Bring x terms to 1 side, constant to the other:</em>
3x -x= 156 -86
<em>Simplify:</em>
2x= 70
<em>Divide both sides by 2:</em>
x= 35
Amount of DVDs left
= 86 -x
= 86 -35
= 51
Subtract the one value from 180 and then divide that number by 2 to get the 2 values. So if one side is 90, they other sides would be 45 each
