2(2x - 5) + 6 = 20solve for xplease show stepsx=_

Mathematics

2 answers:

Sloan [31]3 years ago

7 0

Answer:

Step-by-step explanation:

The first step is to distribute.

2(2x) 2(5)

this will give you 4x and 10.

4x +10 +6=20

then, you add 10 and 6, which will give you 16

4x +16=20

next, you subtract 16 on both sides, which will leave you with 4x =4

x=1

nevsk [136]3 years ago

4 0

Answer:

x = 6.

Step-by-step explanation:

2(2x - 5) + 6 = 20

4x - 10 + 6 = 20

4x - 4 = 20

4x = 20 + 4

4x = 24

x = 24/4

x = 6.

You might be interested in

An air traffic controller spots two airplanes at the same altitude converging to a point as they fly at right angles to each oth

muminat

So.... notice the picture below

we know when y = 140 and x = 240, r = 250

so let's use the pythagorean theorem

$\bf r^2=x^2+y^2\implies 2r\cfrac{dr}{dt}=2x\cfrac{dx}{dt}+2y\cfrac{dy}{dt}\implies \cfrac{dr}{dt}=\cfrac{x\frac{dx}{dt}+y\frac{dy}{dt}}{r}
\\\\\\
\cfrac{dr}{dt}=\cfrac{240\cdot 480+70\cdot 140}{250}\implies \cfrac{dr}{dt}=500$

now... how much time does the controller have? well, say, plane "y" is going at dy/dt of 140mph, and is 70 miles away, 140 is 2*70, so it can cover those 70 miles in 1/2 hr, and when it does, it'll collide with the other,

so, the controller has that much, less than 1/2 hr