SOLUTION: Solve using systems of linear equations with two variables: C1+C2=0.00027 and C1-C2=0.0016

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Question 974238: Solve using systems of linear equations with two variables:
C1+C2=0.00027 and C1-C2=0.0016
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

C%5B1%5D%2BC%5B2%5D=0.00027.....eq.1
C%5B1%5D-C%5B2%5D=0.0016......eq.2
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C%5B1%5D%2BC%5B2%5D=0.00027.....eq.1... solve for C%5B1%5D
C%5B1%5D=0.00027-C%5B2%5D........substitute in eq.2

0.00027-C%5B2%5D-C%5B2%5D=0.0016......eq.2...solve for C%5B2%5D
-2C%5B2%5D=0.0016-0.00027
-2C%5B2%5D=0.00133
C%5B2%5D=0.00133%2F-2
highlight%28C%5B2%5D=-0.000665%29
now go to C%5B1%5D=0.00027-C%5B2%5D........substitute C%5B2%5D and solve for C%5B1%5D
C%5B1%5D=0.00027-%28-0.000665%29
C%5B1%5D=0.00027%2B0.000665
highlight%28C%5B1%5D=0.000935%29

check:
C%5B1%5D%2BC%5B2%5D=0.00027.....eq.1
0.000935-0.000665=0.00027
0.00027=0.00027