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Mademuasel [1]
2 years ago
10

If 3x+9=(10+x) then what does x equal?

Mathematics
2 answers:
serious [3.7K]2 years ago
7 0
Remember you can do anything to an equation as long as you do it to both sides

3x+9=10+x
minus x both sides
3x-x+9=10+x-x
2x+9=10+0
2x+9=10
minus 9 both sides
2x+9-9=10-9
2x+0=1
2x=1
divide both sides by 2
x=1/2
neonofarm [45]2 years ago
3 0
3x + 9 = 10 + x
2x +9 = 10
2x = 1
x = 1/2
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Answer:

20 lbs

Step-by-step explanation:

2/5ths of the food would be 20 pounds because:

2/5 * 50 = 20

2/10ths of the food would be 10 pounds because:

2/10 * 50 = 10

If we add those two together, we would get the total amount that the dog ate, which would be 30 pounds. SInce the dog ate 30 pounds of food out of the 50 pounds, there would be 20 pounds left in the bag at the end of two months:

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3 years ago
How would you divide 5.6 into five even pieces
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Work out 77 % of 775.66 m Give your answer rounded to 2 DP.
Zinaida [17]

Answer:

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Step-by-step explanation:

We need to find 77% of 775.66 m.

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Read 2 more answers
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