Solve for a, b, c
a=1
b=-2
c=8
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a=-b-1
Solve a+b=-1 for a.
-b-1+c=9 3\left(-b-1\right)+b=1
Substitute -b-1 for a in the second and third equation.
c=b+10 b=-2
Solve these equations for c and b respectively.
c=-2+10
Substitute -2 for b in the equation c=b+10.
c=8
Calculate c from c=-2+10.
a=-\left(-2\right)-1
Substitute -2 for b in the equation a=-b-1.
a=1
Calculate a from a=-\left(-2\right)-1.
a=1 b=-2 c=8
The system is now solved.
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