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kvasek [131]
2 years ago
14

5x + 15 = 2x +3 x = what

Mathematics
1 answer:
gladu [14]2 years ago
5 0

5x + 15 = 2x + 3 \\ 5x + 15 + 3 = 2x \\ 5x + 18 = 2x \\ 18 = 2x - 5x \\  - 3x = 18 \\ x =  \frac{18}{ - 3}  \\  \\ x =  - 6

<h2><u>x = (-6)</u></h2>

Hope this will help...

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The length of a bridge on a map is 1.5 cm. What is the actual length of the bridge in meters if the map is drawn at a scale of 1
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Step-by-step explanation:

If the length of a bridge on a map is 1 cm,then the actual length = 40,000

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Marisol is being paid $792 to provide nutrition counseling, It took her 8 hours more than she expected, so
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Answer: 44 hours.

Step-by-step explanation:

Marisol is being paid $792.

We know that the job took her 8 hours more than she expected, so if we define T as the time she expected, this job took her:

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The amount of money per hour that she expected is calculated as:

$792/T = X

And for those 8 extra hours, she won $4 less per hour, then we have:

$792/(T + 8hs) = X - $4

Then we have a system of equations:

$792/T = X

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0*T = ($792*(8hs/T) - $4*T + $32*hs)*T

0 = $792*8hs - $4*T^2 +$32*T*hs

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0 = -4*T^2 + 32*T + 792*8

The solutions cab be found by using the Bhaskara´s formula, these are:

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