02-11-2017
Mathematics

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Solve equations with 3 variables

Solve equations with 3 variables class=

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tynollette tynollette

02-11-2017

add up equation 1 and 2 to eliminate b
(a+b)+(-b+c)=3+3 => a+c=6
subtract this new equation from the third equation:
(a+2c)-(a+c)=10-3 =>c=4
plug in c=4 in a+c=6 =>a=2
a+b=3, a=2 =>b=1

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