Solving Equations - XP Math - Forums

 XP Math - Forums Solving Equations

 10-11-2010 #1 Alize'Quinones   Join Date: Oct 2010 Posts: 1 Solving Equations Hey everybody, I need some help with the following equations: -g + b =y solve for b a/b = c solve for a x/y = z solve for x x/y + k = p solve for x xyz = m solve for y c = 5p + 215 solve for p 0.4x - 0.2 = 1 - Please and thank you for the help.
10-22-2010   #2
MAS1

Join Date: Dec 2008
Posts: 249

Quote:
 Originally Posted by Alize'Quinones Hey everybody, I need some help with the following equations: -g + b =y solve for b a/b = c solve for a x/y = z solve for x x/y + k = p solve for x xyz = m solve for y c = 5p + 215 solve for p 0.4x - 0.2 = 1 - Please and thank you for the help.
1. -g + b = y
-g + g + b = y + g
0 + b = y + g
b = y + g

2. a/b = c
b(a/b) = bc
(b/b)(a) = bc
1(a) = bc
a = bc

3. Same as number 2.

4. x/y + k = p
x/y + k - k = p - k
x/y + 0 = p - k
x/y = p - k
y(x/y) = y(p - k)
(y/y)(x) = y(p - k)
1(x) = y(p - k)
x = y(p - k)

5. xyz = m
yxz = m
(yxz)/(xz) = m/(xz)
y = m/(xz)

6. c = 5p + 215
c - 215 = 5p + 215 - 215
c - 215 = 5p + 0
c - 215 = 5p
(c - 215)/5 = 5p/5
(c - 215)/5 = p

7. 0.4x - 0.2 = 1
0.4x - 0.2 + 0.2 = 1 + 0.2
0.4x + 0 = 1.02
0.4x = 1.02
0.4x/0.4 = 1.02/4
x = 0.255

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