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2 years ago

What is the solution to the equation 15+x = –7? a. –8 b. 22 c. 8 d. –22

2 answers:

5 0

15 + x = -7

First, subtract 15 from both sides. / Your problem should look like: $x = -7 - 15$
Second, subtract -7 - 15 to get -22. / Your problem should look like: $x = -22$

Answer: x = -22 (D)

andrey2020 [161]2 years ago

3 0

$15+x=-7$
$x=-7-15$
$x=-22$
$Answer:-22$

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Natali5045456 [20]

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Step-by-step explanation:

Given:

Last month, family had used 40% of the monthly income for gasoline, and 63% of that gasoline was consumed by the family's SUV.

The family's SUV used $261.45 worth of gasoline previous month.

Now, to find the money left of the family monthly income after gasoline expenses.

Let the total money spend on gasoline be $g.$

As, given:

The family's SUV used $261.45 worth of gasoline, which was 63% of the gasoline that was consumed.

According to question:

$63\%\ of\ g=$261.45.\\\\$

$\frac{63}{100} \times g=261.45\\\\0.63\times g=261.45$

Dividing both sides 0.63 we get:

$g=\$415.$

The total money spend on gasoline = $415.

Now, 40% of the monthly income is used for gasoline.

Let the total monthly income be $x.$

So, to get the monthly income we put an equation:

$40\%\ of\ x=\$415\\\\\frac{40}{100}\times x=415\\\\0.40\times x=415$

Dividing both sides by 0.40 we get:

$x=\$1037.50.$

The total monthly income = $1037.50.

Now, to get the money left after gasoline expenses we subtract the total money spend on gasoline from the total monthly income:

$\$1037.50-\$415\\\\=\$622.50.$

Therefore, the money left after gasoline expenses was $622.50.

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2 years ago