When two times a number is decreased by 3 the result is 11 what is the number

2x - 3 = 11

Solve:

2x = 14

x = 7

The answer is 7

Hi there!

Let's replace "a number" by "x":

- two times x = 2x

- decreased by 3 = -3

Here's what the equation should look like:

2x - 3 = 11

Now that you have written down your equation, all you have to do now is solve it for "x" by isolating it :

2x - 3 = 11

Add 3 on each side of the equation

2x = 14

Divide each side of the equation by 2

x = 7

Your answer is: The number is 7.

There you go! I really hope this helped, if there's anything just let me know! :)

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2