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4 years ago

Three-fourths was subtracted from a number, and then 5 was added to the result. The sum was -7. What was the original number?

Mathematics

2 answers:

BartSMP [9]4 years ago

6 0

Let x be the original number.

x - 0.75 + 5 = -7

x + 4.25 = -7

x = -11.25

Hence, none of the answers are correct!

AVprozaik [17]4 years ago

4 0

Answer:

Let x be the original number.

x - 0.75 + 5 = -7

x + 4.25 = -7

x = -11.25

Brainliest???

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The correct answer would be 3, if im not mistaken

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Sav [38]

Simplifying
5y + -2 = 4y + 7

Reorder the terms:
-2 + 5y = 4y + 7

Reorder the terms:
-2 + 5y = 7 + 4y

Solving
-2 + 5y = 7 + 4y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-4y' to each side of the equation.
-2 + 5y + -4y = 7 + 4y + -4y

Combine like terms: 5y + -4y = 1y
-2 + 1y = 7 + 4y + -4y

Combine like terms: 4y + -4y = 0
-2 + 1y = 7 + 0
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Add '2' to each side of the equation.
-2 + 2 + 1y = 7 + 2

Combine like terms: -2 + 2 = 0
0 + 1y = 7 + 2
1y = 7 + 2

Combine like terms: 7 + 2 = 9
1y = 9

Divide each side by '1'.
y = 9

Simplifying
y = 9

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