You can find additive inverse to find integers and their opposites closed under addition.
Answer:

Step-by-step explanation:
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1.
<span>1.5x-1 > 6.5
1.5x>1+6.5
</span>1.5x>7.5, divide by 1.5
x>5, is represented by the region to the right of the vertical line x=5
2.
<span>7x+3 < -25
7x<-25-3
7x<-28, divide by 4:
x<-4
</span>x<-4, is represented by the region to the left of the vertical line x=-4
Answer: check the picture
Answer:
1. 1
2. 10
3. 12
Step-by-step explanation:
Answer:
The answer is 140
Step-by-step explanation:
When the total measurements of the six-shaped corners is equal 720
Then x equal to

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