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Natali5045456 [20]
2 years ago
6

-6x>54. solve for x does the sign flip since its neg

Mathematics
2 answers:
AnnyKZ [126]2 years ago
7 0
Yes! You do flip the sign if you are dividing by a negative.

So,

-6x>54

x<-9

I hope this helps!
~kaikers
Fantom [35]2 years ago
4 0
Yes, you do flip the sign since you are dividing by a negative number. the correct answer should be x<-9. i hope this helped.
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ruslelena [56]
1. -x+9y=-5
x-5y=1
-----------------
x=1+5y
-(1+5y)+9y=-5
-1-5y+9y=-5
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4y=-5-(-1)
4y=-5+1=-4
4y=-4
y=-4/4=-1
So x=1+5y=1+5(-1)=1-5=-4
Answer: x=-4, y=-1. (-4, -1).

2) -7x-y=13
8x+y=-14
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y=-14-8x
-7x-(-14-8x)=13
-7x+14+8x=13
14+x=13
x=13-14=-1
y=-14-8(-1)=-14+8=-6.
Answer: x=-1, y=-6. (-1, -6).

3) x+7y=24
x-9y=-24
----------------
x=24-7y
24-7y-9y=-24
24-16y=-24
16y=24-(-24)=24+24=48
y=48/16=3
x=24-7(3)=24-21=3
Answer: x=3, y=3. (3, 3).

4). 3x+y=-21
x+y=-5
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x=-5-y
3(-5-y)+y=-21
-15-3y+y=-21
-15-2y=-21
2y=-15-(-21)=-15+21=6
y=6/2=3
x=-5-3=-8.
Answer: x=-8, y=3. (-8, 3).

5) 3x+6y=6
9x-12y=18
---------------
Simplify 3x+6y=6 will get you x+2y=2,
x=2-2y,
9(2-2y)-12y=18
18-18y-12y=18
18-30y=18
30y=18-18=0
y=0/30=0
x=2-2(0)=2-0=2
Answer: x=2, y=0. (2, 0).

6) 6x+8y=26
-7x+2y=-19
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-4(-7x+2y)=-4(-19)
28x-8y=76
---------------------------
6x+8y=26
28x-8y=76
-----------------
34x=102
x=102/34=3
6(3)+8y=26
18+8y=26
8y=26-18=8
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Answer: x=3, y=1. (3, 1)

BONUS:
-5x+5y=-25
3x+2y=10
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Simplify -5x+5y=-25 you will get x-y=5
x=y+5
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2 years ago
What is the value of the expression 1 2/3 2/7​
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Answer:

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2 years ago
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Answer:

9. \frac{1}{10} fraction.

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10. Therefore, Callie hiked (\frac{4}{5} - \frac{1}{2}) = \frac{8 - 5}{10} = \frac{3}{10} fraction than Jon hiked. (Answer)

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Annabelle traded $2250 for euros, immediately changed her mind, and then promptly traded her euros back into dollars. Which of t
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More than $0 but less that $2250
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3 years ago
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