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andrezito [222]
3 years ago
6

How do u figure out the problem of 1/5d = -3

Mathematics
1 answer:
love history [14]3 years ago
4 0
So 1/5d=-3 so you multiply both sides by 5d/1 so you get
5d/1 times 1/5d=5d/1 times -3/1
so the above statement simplifies to 5d/5d=5d times -3 or
1=-15d
so you multiply both sides by -1
-1=15d
divide both sides by 15
-1/15=d
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Simplify and solve for x. ​ ​ 5(x+20)= 7x+30
hodyreva [135]

Answer:

x = 35

Step-by-step explanation:

Solve for x:

5 (x + 20) = 7 x + 30

Expand out terms of the left hand side:

5 x + 100 = 7 x + 30

Subtract 7 x from both sides:

(5 x - 7 x) + 100 = (7 x - 7 x) + 30

5 x - 7 x = -2 x:

-2 x + 100 = (7 x - 7 x) + 30

7 x - 7 x = 0:

100 - 2 x = 30

Subtract 100 from both sides:

(100 - 100) - 2 x = 30 - 100

100 - 100 = 0:

-2 x = 30 - 100

30 - 100 = -70:

-2 x = -70

Divide both sides of -2 x = -70 by -2:

(-2 x)/(-2) = (-70)/(-2)

(-2)/(-2) = 1:

x = (-70)/(-2)

The gcd of -70 and -2 is -2, so (-70)/(-2) = (-2×35)/(-2×1) = (-2)/(-2)×35 = 35:

Answer: x = 35

6 0
3 years ago
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How Can you divide that
Archy [21]
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Answer:

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Step-by-step explanation:

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