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IgorC [24]
3 years ago
5

1. -4x + 5 = 2x - 7 2. 6x - 8 = 4x + 2 3. -3x - 5 = 2x + 10

Mathematics
1 answer:
Svetllana [295]3 years ago
7 0

Answer: 1. x=2

 2. x=5    

 3.x=-3

Isolate the variable by dividing each side by factors that don't contain the variable.

Move all terms not containing x    to the right side of the equation.

Hope this helped

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xz_007 [3.2K]
This problem is simply asking us to add the weights which are presented as fractions. You can easily get the answer if you input them directly in a calculator. But I think the challenge here is to manually add fractions.

Let's add the two 1/4 lb weights because it is easier for they have a common denominator. Just simply add the numerators.

1/4 + 1/4 = 2/4

Then, add with this the fraction part of 2 1/5.

2/4 + 1/5 = ?
The least common denominator is 4*5 = 20. Then divide 20 with each denominator and multiply to their respective numerator.

2/4 + 1/5 = [(20/4 * 2) + (20/5 *1)]/20 = 14/20

14/20 is simplified to 7/10. Then add the whole number 2. <em>Therefore, the sum of all weights is 2 7/10 pounds.</em>
5 0
3 years ago
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MatroZZZ [7]

Answer:

5.781 inches.

Step-by-step explanation:

Since Mr. Jimerson records the amount of snowfall that the local area recieves, recording the following data: 12 am-1am: 0.3 inches | 1 am-2am: 0.8 inches | 2 am-3am: 1.36 inches | 3 am-4am: 2.019, if the total amount of snowfall at 7am is 7.8 inches, to determine how much snow fell between 4 am-7am the following calculation must be performed:

7.8 - 2.019 = X

5.781 = X

Therefore, since the amount of snow accumulated at 7 am was 7.8 inches, the snowfall between 4 and 7 am was 5.781 inches.

6 0
2 years ago
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Step-by-step explanation:

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3 years ago
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5 0
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Natasha2012 [34]

Answer:

500

Step-by-step explanation:

125 x 4

8 0
3 years ago
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