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liq [111]
3 years ago
12

Help?

Mathematics
2 answers:
arsen [322]3 years ago
7 0
Let's simplify the inequality:

7-2/3x<x-8

first we add 8 to each side:
15-2/3x<x

Now we add 2/3x to each side:
15<1 2/3x or 15<5/3x

Divide each side by 5/3 so the right side becomes x
9<x

Now you flip it:
x>9

therefore the answer is 1.

Hope this helps :)
Nata [24]3 years ago
5 0
The rules are similar to those for equations
first add 2/3 x to both sides
7 < x + 2/3 x - 8
add 8 to both sides
15 < 5/3 x
inverting we get
5/3 x > 15 
now divide both sides by 5/3
x >  15 / 5/3 = 15 * 3/5 =  9

x > 9
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What you need help with
3 0
3 years ago
Edith’s age is 1/4 of Ronald’s age. In how many years will Edith’s age be 1/3 of Ronald’s age if Edith is 20 years old?
ruslelena [56]

Answer:

10

Step-by-step explanation:

x = Edith's age = 20 years

y = Ronald's age

x = 20 = y/4

y = 20×4 = 80 years

in z years we have

(x + z) = (y + z)/3

(20 + z) = (80 + z)/3

3(20 + z) = 80 + z

60 + 3z = 80 + z

60 + 2z = 80

2z = 20

z = 10

in 10 years Edith's age will be 1/3 of Ronald's age.

then Edith will be 30, and Ronald will be 90.

30 = 90/3

correct.

7 0
1 year ago
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