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Solve for a, c, b
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a=2-c
Solve 2=a+c for a.
3=2-c+b+2c 0=-\left(2-c\right)-2b-2c
Substitute 2-c for a in the second and third equation.
c=1-b b=-1-\frac{1}{2}c
Solve these equations for c and b respectively.
b=-1-\frac{1}{2}\left(1-b\right)
Substitute 1-b for c in the equation b=-1-\frac{1}{2}c.
b=-3
Solve b=-1-\frac{1}{2}\left(1-b\right) for b.
c=1-\left(-3\right)
Substitute -3 for b in the equation c=1-b.
c=4
Calculate c from c=1-\left(-3\right).
a=2-4
Substitute 4 for c in the equation a=2-c.
a=-2
Calculate a from a=2-4.
a=-2 c=4 b=-3
The system is now solved.