SOLUTION: Use the equations below to find the length of the pipe. (there is a pipe separated into an a, b, and c section) a + b = 15 b - a = 3 a + b

SOLUTION: Use the equations below to find the length of the pipe. (there is a pipe separated into an a, b, and c section) a + b = 15 b - a = 3 a + b - 12 = c How do i set up

Question 636896: Use the equations below to find the length of the pipe.
(there is a pipe separated into an a, b, and c section)
a + b = 15
b - a = 3
a + b - 12 = c

How do i set up an equation for this problem?
Thanks!
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
There are 3 equations and 3 unknowns.
That means this is solvable, since
number of unknowns must equal
number of equations to solve.
------------
(1)
(2)
(3)
------------------
(1)
Substitute this into (2)
(2)
(2)
(2)
(2)
(2)
and, since
(1)
(1)
(1)
Substitute these results into (3)
(3)
(3)
(3)
(3)
-----------

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