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

Mathematics

2 answers:

borishaifa [10]3 years ago

7 0

3x + 12 = 7x - 18
30 = 4x
15/2 or 7.5 or 7 1/2 = x

Galina-37 [17]3 years ago

6 0

Step-by-step explanation:

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

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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If you mean how many weeks total, 125 according to the 20 dollars a week would bring it 22 weeks i think.. since the answer answer is 21.2 weeks exactly when you divide 425 by 20.

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