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2 years ago

12

Forty-eight decreased by a number is the same as the difference of four times the number and seven. Find the number

2 answers:

professor190 [17]2 years ago

7 0

Hello : let x this number
4x-7 = 48-x
4x+x-7=48-x+x
5x-7 =48
5x-7+7 = 48+7
5x=55
x=55/5=11

vagabundo [1.1K]2 years ago

5 0

Turn the text into an eqation:

48-x = 4x-7
5x = 55
x = 11

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Read 2 more answers

I am supposed to simplify 1/a-b - 1/b-a

Andre45 [30]

Answer:

see explanation

Step-by-step explanation:

Given

$\frac{1}{a-b}$ - $\frac{1}{b-a}$

Before subtracting the fractions, we require them to have common denominator.

Multiply the numerator/denominator of the second fraction by - 1

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We now have

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