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natima [27]
2 years ago
12

3x+12=7x-18 I need the individual steps

Mathematics
2 answers:
borishaifa [10]2 years ago
7 0
3x + 12 = 7x - 18
30 = 4x
15/2 or 7.5 or 7 1/2 = x

Galina-37 [17]2 years ago
6 0

Step-by-step explanation:

*Whatever you do to one side of the equal sign you must do to the other!

  1. Move the (coefficients?) to one side of the equal sign

2. Get rid of the constant(Notice the negative sign beside the 18. This means you add to get to 0)

3. Separate the number from the variable by dividing because 4x= 4 times x. You must do the inverse operation to get rid of the 4. (Inverse of addition is subtraction, Inverse of subtraction is addition, Divisions multiplication and multiplications division)

Since 4 doesn't go into 30 evenly, I chose to keep it as an improper fraction. If you'd prefer mixed number: 7 2/30

Sorry if it's confusing! Hope I helped! :)

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3 years ago
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zhuklara [117]
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2 years ago
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kondaur [170]

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87.92

Step-by-step explanation:

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6 0
3 years ago
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saveliy_v [14]

Answer:

The equipment elevator is positioned 481 feet closer and the miner equipment is positioned 342 feet closer relative to the surface. The equipment elevator is deeper.

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The rate that both elevators descend are the same according to the information given in the question.

After 18 seconds, the equipment elevator has descended 18 x 13 = 234 feet.

After another 19 seconds, the equipment elevator has descended for a total of 37 seconds which results in 481 feet and the miner elevator has descended for 19 seconds which gives us a descend of 342 feet.

So they are 481 and 342 feet closer relative to the surface and the equipment elevator is deeper since it has descended for a longer period of time.

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