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V125BC [204]
3 years ago
13

Given: 3x = 5 (x − 4) Prove: x = 10

Mathematics
1 answer:
damaskus [11]3 years ago
4 0

Answer:

see the procedure

Step-by-step explanation:

we have

3x=5(x-4)

step 1

3x=5(x-4) ------> given problem

step 2

Applying the Distributive Property right side

3x=5(x)-5(4)

3x=5x-20

step 3

Applying the Subtraction Property of Equality

Subtract (3x-20) both sides

3x-(3x-20)=5x-20-(3x-20)

20=2x

step 4

Applying Division Property of Equality

Divide by 2 both sides

20\2=x

Rewrite

x=10

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Remark
If you don't start exactly the right way, you can get into all kinds of trouble. This is just one of those cases. I think the best way to start is to divide both terms by x^(1/2)

Step One
Divide both terms in the numerator by x^(1/2)
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Step Two
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I suppose this is possible.
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Frankly I like the first answer better, but you have a choice of both.
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3 years ago
Calculus application
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Step-by-step explanation:

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