Х - Зу = 72х - бу = 12need help.solving systems by elimination.
1 answer:
{x - 3y = 7 | · (-2)
{2x - 6y = 12
{-2x + 6y = -14
{2x - 6y = 12 (+)
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-2x + 2x + 6y + (-6y) = -14 + 12
0 = -2
contradiction
x, y ∈ ∅
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