Elbandidojimboyviz
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ELIMINATION BY ADDITION AND SUBTRACTION

a-2b+c=5
b+2c=2
2a+3c=4

please answer i need it now

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AnneCviz
a -2b +c = 5         EQ1
   2b +4c = 4         EQ2 x2
a +  5c = 9            ANS 1

-2a -10c = -18        ANS1 x-2
2a   + 3c = 4           EQ3
-7c = -14

c=2
Substitute this to EQ3, we get a=-1.
Substitute to EQ2, we get b=-2.

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