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Word Problem
100

 x + 5y = 10    solve for x

x = 10 - 5y

100

x=8+2y     solve for y

(x-8)/2=y

100

The circumference of a circle is 

 C=2pir 

find r

C/(2pi)=r

200

 10x + y = 8      solve for y

y=8-10x

200

x=yz+w     solve for y

(x-w)/z=y

200

Using the radius of a circumference formula, 

 C/(2pi)=r 

find r, given the circumference is 5

5/(2pi)=r

0.8=r

300

xy = 5      solve for x

x=5/y

300

 (x + 1)/2=y      solve for x

x=2y-1

300

The formula for area of a rectangle is 

L * W = A

If the area = 100, and L = 5, find the width, W

W = 20

400

 y/7=x      solve for y

y = 7x

400

 (2y+5)/x=10     solve for y

y=(10x-5)/2

400

The formula for Area of a circle is 

 A=pir^2 

If the radius is 8.5in, find the area.

A = 227 sq. in.

500

 x(5 + y)=4     Solve for x

x=(4)/(5+y)

500

 x(4+y)=z     solve for y

y=(z-4x)/x

500

The formula for area of a triangle is

 A=1/2bh     b = base, h = height

Solve for h

(2A)/b=h